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[TD-2971] feature: make python connector support unsigned type. fix pep8 format.

This commit is contained in:
Shuduo Sang 2021-02-19 09:54:00 +08:00
parent 8904a04603
commit 42efe016c7
25 changed files with 838 additions and 344 deletions
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1
src/connector/python/linux/python2/taos/__init__.py
View File

@ -8,6 +8,7 @@ paramstyle = 'pyformat'
__all__ = ['connection', 'cursor']
def connect(*args, **kwargs):
""" Function to return a TDengine connector object

299
src/connector/python/linux/python2/taos/cinterface.py
View File

@ -4,11 +4,14 @@ from .error import *
import math
import datetime
def _convert_millisecond_to_datetime(milli):
return datetime.datetime.fromtimestamp(milli/1000.0)
return datetime.datetime.fromtimestamp(milli / 1000.0)
def _convert_microsecond_to_datetime(micro):
return datetime.datetime.fromtimestamp(micro/1000000.0)
return datetime.datetime.fromtimestamp(micro / 1000000.0)
def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bool row to python row
@ -18,208 +21,309 @@ def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
_timestamp_converter = _convert_microsecond_to_datetime
if num_of_rows > 0:
return list(map(_timestamp_converter, ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
return list(map(_timestamp_converter, ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
else:
return list(map(_timestamp_converter, ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
return list(map(_timestamp_converter, ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bool row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_bool))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_bool))[
:abs(num_of_rows)]]
def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C tinyint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
def _crow_tinyint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_tinyint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
"""Function to convert C tinyint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C smallint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
return [
None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
def _crow_smallint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_smallint_unsigned_to_python(
data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C smallint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
return [
None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C int row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C int row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_int))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_int))[
:abs(num_of_rows)]]
def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bigint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
def _crow_bigint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_bigint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
"""Function to convert C bigint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_long))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_long))[
:abs(num_of_rows)]]
def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C float row to python row
"""
if num_of_rows > 0:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
else:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C double row to python row
"""
if num_of_rows > 0:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
else:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
if num_of_rows > 0:
return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
else:
return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
res=[]
res = []
for i in range(abs(num_of_rows)):
try:
if num_of_rows >= 0:
tmpstr = ctypes.c_char_p(data)
res.append( tmpstr.value.decode() )
res.append(tmpstr.value.decode())
else:
res.append( (ctypes.cast(data+nbytes*i, ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
res.append((ctypes.cast(data + nbytes * i,
ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
except ValueError:
res.append(None)
return res
return res
def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
res=[]
res = []
if num_of_rows > 0:
for i in range(abs(num_of_rows)):
try:
rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode()[0:rbyte] )
rbyte = ctypes.cast(
data + nbytes * i,
ctypes.POINTER(
ctypes.c_short))[
:1].pop()
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode()[0:rbyte])
except ValueError:
res.append(None)
else:
for i in range(abs(num_of_rows)):
try:
rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode()[0:rbyte] )
rbyte = ctypes.cast(
data + nbytes * i,
ctypes.POINTER(
ctypes.c_short))[
:1].pop()
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode()[0:rbyte])
except ValueError:
res.append(None)
return res
def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
res=[]
res = []
if num_of_rows >= 0:
for i in range(abs(num_of_rows)):
try:
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode() )
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode())
except ValueError:
res.append(None)
else:
for i in range(abs(num_of_rows)):
try:
res.append( (ctypes.cast(data+nbytes*i+2, ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
res.append((ctypes.cast(data + nbytes * i + 2,
ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
except ValueError:
res.append(None)
return res
_CONVERT_FUNC = {
FieldType.C_BOOL: _crow_bool_to_python,
FieldType.C_TINYINT : _crow_tinyint_to_python,
FieldType.C_SMALLINT : _crow_smallint_to_python,
FieldType.C_INT : _crow_int_to_python,
FieldType.C_BIGINT : _crow_bigint_to_python,
FieldType.C_FLOAT : _crow_float_to_python,
FieldType.C_DOUBLE : _crow_double_to_python,
FieldType.C_TINYINT: _crow_tinyint_to_python,
FieldType.C_SMALLINT: _crow_smallint_to_python,
FieldType.C_INT: _crow_int_to_python,
FieldType.C_BIGINT: _crow_bigint_to_python,
FieldType.C_FLOAT: _crow_float_to_python,
FieldType.C_DOUBLE: _crow_double_to_python,
FieldType.C_BINARY: _crow_binary_to_python,
FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
FieldType.C_NCHAR : _crow_nchar_to_python,
FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
FieldType.C_NCHAR: _crow_nchar_to_python,
FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
}
_CONVERT_FUNC_BLOCK = {
FieldType.C_BOOL: _crow_bool_to_python,
FieldType.C_TINYINT : _crow_tinyint_to_python,
FieldType.C_SMALLINT : _crow_smallint_to_python,
FieldType.C_INT : _crow_int_to_python,
FieldType.C_BIGINT : _crow_bigint_to_python,
FieldType.C_FLOAT : _crow_float_to_python,
FieldType.C_DOUBLE : _crow_double_to_python,
FieldType.C_TINYINT: _crow_tinyint_to_python,
FieldType.C_SMALLINT: _crow_smallint_to_python,
FieldType.C_INT: _crow_int_to_python,
FieldType.C_BIGINT: _crow_bigint_to_python,
FieldType.C_FLOAT: _crow_float_to_python,
FieldType.C_DOUBLE: _crow_double_to_python,
FieldType.C_BINARY: _crow_binary_to_python_block,
FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
FieldType.C_NCHAR : _crow_nchar_to_python_block,
FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
FieldType.C_NCHAR: _crow_nchar_to_python_block,
FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
}
# Corresponding TAOS_FIELD structure in C
class TaosField(ctypes.Structure):
_fields_ = [('name', ctypes.c_char * 65),
('type', ctypes.c_char),
('bytes', ctypes.c_short)]
# C interface class
class CTaosInterface(object):
libtaos = ctypes.CDLL('libtaos.so')
@ -256,7 +360,7 @@ class CTaosInterface(object):
except AttributeError:
raise AttributeError("config is expected as a str")
if config != None:
if config is not None:
CTaosInterface.libtaos.taos_options(3, self._config)
CTaosInterface.libtaos.taos_init()
@ -267,7 +371,13 @@ class CTaosInterface(object):
"""
return self._config
def connect(self, host=None, user="root", password="taosdata", db=None, port=0):
def connect(
self,
host=None,
user="root",
password="taosdata",
db=None,
port=0):
'''
Function to connect to server
@ -276,7 +386,7 @@ class CTaosInterface(object):
# host
try:
_host = ctypes.c_char_p(host.encode(
"utf-8")) if host != None else ctypes.c_char_p(None)
"utf-8")) if host is not None else ctypes.c_char_p(None)
except AttributeError:
raise AttributeError("host is expected as a str")
@ -295,7 +405,7 @@ class CTaosInterface(object):
# db
try:
_db = ctypes.c_char_p(
db.encode("utf-8")) if db != None else ctypes.c_char_p(None)
db.encode("utf-8")) if db is not None else ctypes.c_char_p(None)
except AttributeError:
raise AttributeError("db is expected as a str")
@ -308,11 +418,11 @@ class CTaosInterface(object):
connection = ctypes.c_void_p(CTaosInterface.libtaos.taos_connect(
_host, _user, _password, _db, _port))
if connection.value == None:
if connection.value is None:
print('connect to TDengine failed')
raise ConnectionError("connect to TDengine failed")
# sys.exit(1)
#else:
# else:
# print('connect to TDengine success')
return connection
@ -333,7 +443,8 @@ class CTaosInterface(object):
@rtype: 0 on success and -1 on failure
'''
try:
return CTaosInterface.libtaos.taos_query(connection, ctypes.c_char_p(sql.encode('utf-8')))
return CTaosInterface.libtaos.taos_query(
connection, ctypes.c_char_p(sql.encode('utf-8')))
except AttributeError:
raise AttributeError("sql is expected as a string")
# finally:
@ -348,7 +459,7 @@ class CTaosInterface(object):
@staticmethod
def subscribe(connection, restart, topic, sql, interval):
"""Create a subscription
@restart boolean,
@restart boolean,
@sql string, sql statement for data query, must be a 'select' statement.
@topic string, name of this subscription
"""
@ -400,35 +511,49 @@ class CTaosInterface(object):
result, ctypes.byref(pblock))
if num_of_rows == 0:
return None, 0
isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [ele for ele in ctypes.cast(fieldL, ctypes.POINTER(ctypes.c_int))[:len(fields)]]
fieldLen = [
ele for ele in ctypes.cast(
fieldL, ctypes.POINTER(
ctypes.c_int))[
:len(fields)]]
for i in range(len(fields)):
data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
if fields[i]['type'] not in _CONVERT_FUNC_BLOCK:
raise DatabaseError("Invalid data type returned from database")
blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
return blocks, abs(num_of_rows)
@staticmethod
def fetchRow(result, fields):
pblock = ctypes.c_void_p(0)
pblock = CTaosInterface.libtaos.taos_fetch_row(result)
if pblock :
pblock = CTaosInterface.libtaos.taos_fetch_row(result)
if pblock:
num_of_rows = 1
isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [ele for ele in ctypes.cast(fieldL, ctypes.POINTER(ctypes.c_int))[:len(fields)]]
fieldLen = [
ele for ele in ctypes.cast(
fieldL, ctypes.POINTER(
ctypes.c_int))[
:len(fields)]]
for i in range(len(fields)):
data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
if fields[i]['type'] not in _CONVERT_FUNC:
raise DatabaseError("Invalid data type returned from database")
raise DatabaseError(
"Invalid data type returned from database")
if data is None:
blocks[i] = [None]
else:
blocks[i] = _CONVERT_FUNC[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
blocks[i] = _CONVERT_FUNC[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
else:
return None, 0
return blocks, abs(num_of_rows)

17
src/connector/python/linux/python2/taos/connection.py
View File

@ -2,9 +2,11 @@ from .cursor import TDengineCursor
from .subscription import TDengineSubscription
from .cinterface import CTaosInterface
class TDengineConnection(object):
""" TDengine connection object
"""
def __init__(self, *args, **kwargs):
self._conn = None
self._host = None
@ -29,7 +31,7 @@ class TDengineConnection(object):
# password
if 'password' in kwargs:
self._password = kwargs['password']
# database
if 'database' in kwargs:
self._database = kwargs['database']
@ -43,7 +45,12 @@ class TDengineConnection(object):
self._config = kwargs['config']
self._chandle = CTaosInterface(self._config)
self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
self._conn = self._chandle.connect(
self._host,
self._user,
self._password,
self._database,
self._port)
def close(self):
"""Close current connection.
@ -55,7 +62,8 @@ class TDengineConnection(object):
"""
if self._conn is None:
return None
sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
sub = CTaosInterface.subscribe(
self._conn, restart, topic, sql, interval)
return TDengineSubscription(sub)
def cursor(self):
@ -80,7 +88,8 @@ class TDengineConnection(object):
"""
pass
if __name__ == "__main__":
conn = TDengineConnection(host='192.168.1.107')
conn.close()
print("Hello world")
print("Hello world")

1
src/connector/python/linux/python2/taos/constants.py
View File

@ -3,6 +3,7 @@
from .dbapi import *
class FieldType(object):
"""TDengine Field Types
"""

21
src/connector/python/linux/python2/taos/cursor.py
View File

@ -128,8 +128,8 @@ class TDengineCursor(object):
if errno == 0:
if CTaosInterface.fieldsCount(self._result) == 0:
self._affected_rows += CTaosInterface.affectedRows(
self._result )
return CTaosInterface.affectedRows(self._result )
self._result)
return CTaosInterface.affectedRows(self._result)
else:
self._fields = CTaosInterface.useResult(
self._result)
@ -148,6 +148,7 @@ class TDengineCursor(object):
"""Fetch the next row of a query result set, returning a single sequence, or None when no more data is available.
"""
pass
def fetchmany(self):
pass
@ -206,16 +207,20 @@ class TDengineCursor(object):
buffer = [[] for i in range(len(self._fields))]
self._rowcount = 0
while True:
block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
block, num_of_fields = CTaosInterface.fetchRow(
self._result, self._fields)
errno = CTaosInterface.libtaos.taos_errno(self._result)
if errno != 0:
raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
raise ProgrammingError(
CTaosInterface.errStr(
self._result), errno)
if num_of_fields == 0:
break
self._rowcount += num_of_fields
for i in range(len(self._fields)):
buffer[i].extend(block[i])
return list(map(tuple, zip(*buffer)))
def fetchall(self):
if self._result is None or self._fields is None:
raise OperationalError("Invalid use of fetchall")
@ -223,16 +228,20 @@ class TDengineCursor(object):
buffer = [[] for i in range(len(self._fields))]
self._rowcount = 0
while True:
block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
block, num_of_fields = CTaosInterface.fetchBlock(
self._result, self._fields)
errno = CTaosInterface.libtaos.taos_errno(self._result)
if errno != 0:
raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
raise ProgrammingError(
CTaosInterface.errStr(
self._result), errno)
if num_of_fields == 0:
break
self._rowcount += num_of_fields
for i in range(len(self._fields)):
buffer[i].extend(block[i])
return list(map(tuple, zip(*buffer)))
def nextset(self):
"""
"""

8
src/connector/python/linux/python2/taos/dbapi.py
View File

@ -4,6 +4,7 @@
import time
import datetime
class DBAPITypeObject(object):
def __init__(self, *values):
self.values = values
@ -16,23 +17,28 @@ class DBAPITypeObject(object):
else:
return -1
Date = datetime.date
Time = datetime.time
Timestamp = datetime.datetime
def DataFromTicks(ticks):
return Date(*time.localtime(ticks)[:3])
def TimeFromTicks(ticks):
return Time(*time.localtime(ticks)[3:6])
def TimestampFromTicks(ticks):
return Timestamp(*time.localtime(ticks)[:6])
Binary = bytes
# STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
# BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
# NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
# DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
# ROWID = DBAPITypeObject()
# ROWID = DBAPITypeObject()

17
src/connector/python/linux/python2/taos/error.py
View File

@ -1,35 +1,41 @@
"""Python exceptions
"""
class Error(Exception):
def __init__(self, msg=None, errno=None):
self.msg = msg
self._full_msg = self.msg
self.errno = errno
def __str__(self):
return self._full_msg
class Warning(Exception):
"""Exception raised for important warnings like data truncations while inserting.
"""
pass
class InterfaceError(Error):
"""Exception raised for errors that are related to the database interface rather than the database itself.
"""Exception raised for errors that are related to the database interface rather than the database itself.
"""
pass
class DatabaseError(Error):
"""Exception raised for errors that are related to the database.
"""Exception raised for errors that are related to the database.
"""
pass
class DataError(DatabaseError):
"""Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
"""
pass
class OperationalError(DatabaseError):
"""Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
"""
@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
"""
pass
class InternalError(DatabaseError):
"""Exception raised when the database encounters an internal error.
"""
pass
class ProgrammingError(DatabaseError):
"""Exception raised for programming errors.
"""
pass
class NotSupportedError(DatabaseError):
"""Exception raised in case a method or database API was used which is not supported by the database,.
"""
pass
pass

23
src/connector/python/linux/python2/taos/subscription.py
View File

@ -1,52 +1,57 @@
from .cinterface import CTaosInterface
from .error import *
class TDengineSubscription(object):
"""TDengine subscription object
"""
def __init__(self, sub):
self._sub = sub
def consume(self):
"""Consume rows of a subscription
"""
if self._sub is None:
raise OperationalError("Invalid use of consume")
result, fields = CTaosInterface.consume(self._sub)
buffer = [[] for i in range(len(fields))]
while True:
block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
if num_of_fields == 0: break
if num_of_fields == 0:
break
for i in range(len(fields)):
buffer[i].extend(block[i])
self.fields = fields
return list(map(tuple, zip(*buffer)))
def close(self, keepProgress = True):
def close(self, keepProgress=True):
"""Close the Subscription.
"""
if self._sub is None:
return False
CTaosInterface.unsubscribe(self._sub, keepProgress)
return True
if __name__ == '__main__':
from .connection import TDengineConnection
conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
conn = TDengineConnection(
host="127.0.0.1",
user="root",
password="taosdata",
database="test")
# Generate a cursor object to run SQL commands
sub = conn.subscribe(True, "test", "select * from meters;", 1000)
for i in range(0,10):
for i in range(0, 10):
data = sub.consume()
for d in data:
print(d)
sub.close()
conn.close()
conn.close()

1
src/connector/python/linux/python3/taos/__init__.py
View File

@ -8,6 +8,7 @@ paramstyle = 'pyformat'
__all__ = ['connection', 'cursor']
def connect(*args, **kwargs):
""" Function to return a TDengine connector object

299
src/connector/python/linux/python3/taos/cinterface.py
View File

@ -4,11 +4,14 @@ from .error import *
import math
import datetime
def _convert_millisecond_to_datetime(milli):
return datetime.datetime.fromtimestamp(milli/1000.0)
return datetime.datetime.fromtimestamp(milli / 1000.0)
def _convert_microsecond_to_datetime(micro):
return datetime.datetime.fromtimestamp(micro/1000000.0)
return datetime.datetime.fromtimestamp(micro / 1000000.0)
def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bool row to python row
@ -18,208 +21,309 @@ def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
_timestamp_converter = _convert_microsecond_to_datetime
if num_of_rows > 0:
return list(map(_timestamp_converter, ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
return list(map(_timestamp_converter, ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
else:
return list(map(_timestamp_converter, ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
return list(map(_timestamp_converter, ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bool row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_bool))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_bool))[
:abs(num_of_rows)]]
def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C tinyint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
def _crow_tinyint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_tinyint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
"""Function to convert C tinyint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C smallint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
return [
None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
def _crow_smallint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_smallint_unsigned_to_python(
data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C smallint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
return [
None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C int row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C int row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_int))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_int))[
:abs(num_of_rows)]]
def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bigint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
def _crow_bigint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_bigint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
"""Function to convert C bigint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_long))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_long))[
:abs(num_of_rows)]]
def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C float row to python row
"""
if num_of_rows > 0:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
else:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C double row to python row
"""
if num_of_rows > 0:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
else:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
if num_of_rows > 0:
return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
else:
return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
res=[]
res = []
for i in range(abs(num_of_rows)):
try:
if num_of_rows >= 0:
tmpstr = ctypes.c_char_p(data)
res.append( tmpstr.value.decode() )
res.append(tmpstr.value.decode())
else:
res.append( (ctypes.cast(data+nbytes*i, ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
res.append((ctypes.cast(data + nbytes * i,
ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
except ValueError:
res.append(None)
return res
return res
def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
res=[]
res = []
if num_of_rows > 0:
for i in range(abs(num_of_rows)):
try:
rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode()[0:rbyte] )
rbyte = ctypes.cast(
data + nbytes * i,
ctypes.POINTER(
ctypes.c_short))[
:1].pop()
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode()[0:rbyte])
except ValueError:
res.append(None)
else:
for i in range(abs(num_of_rows)):
try:
rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode()[0:rbyte] )
rbyte = ctypes.cast(
data + nbytes * i,
ctypes.POINTER(
ctypes.c_short))[
:1].pop()
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode()[0:rbyte])
except ValueError:
res.append(None)
return res
def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
res=[]
res = []
if num_of_rows >= 0:
for i in range(abs(num_of_rows)):
try:
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode() )
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode())
except ValueError:
res.append(None)
else:
for i in range(abs(num_of_rows)):
try:
res.append( (ctypes.cast(data+nbytes*i+2, ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
res.append((ctypes.cast(data + nbytes * i + 2,
ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
except ValueError:
res.append(None)
return res
_CONVERT_FUNC = {
FieldType.C_BOOL: _crow_bool_to_python,
FieldType.C_TINYINT : _crow_tinyint_to_python,
FieldType.C_SMALLINT : _crow_smallint_to_python,
FieldType.C_INT : _crow_int_to_python,
FieldType.C_BIGINT : _crow_bigint_to_python,
FieldType.C_FLOAT : _crow_float_to_python,
FieldType.C_DOUBLE : _crow_double_to_python,
FieldType.C_TINYINT: _crow_tinyint_to_python,
FieldType.C_SMALLINT: _crow_smallint_to_python,
FieldType.C_INT: _crow_int_to_python,
FieldType.C_BIGINT: _crow_bigint_to_python,
FieldType.C_FLOAT: _crow_float_to_python,
FieldType.C_DOUBLE: _crow_double_to_python,
FieldType.C_BINARY: _crow_binary_to_python,
FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
FieldType.C_NCHAR : _crow_nchar_to_python,
FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
FieldType.C_NCHAR: _crow_nchar_to_python,
FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
}
_CONVERT_FUNC_BLOCK = {
FieldType.C_BOOL: _crow_bool_to_python,
FieldType.C_TINYINT : _crow_tinyint_to_python,
FieldType.C_SMALLINT : _crow_smallint_to_python,
FieldType.C_INT : _crow_int_to_python,
FieldType.C_BIGINT : _crow_bigint_to_python,
FieldType.C_FLOAT : _crow_float_to_python,
FieldType.C_DOUBLE : _crow_double_to_python,
FieldType.C_TINYINT: _crow_tinyint_to_python,
FieldType.C_SMALLINT: _crow_smallint_to_python,
FieldType.C_INT: _crow_int_to_python,
FieldType.C_BIGINT: _crow_bigint_to_python,
FieldType.C_FLOAT: _crow_float_to_python,
FieldType.C_DOUBLE: _crow_double_to_python,
FieldType.C_BINARY: _crow_binary_to_python_block,
FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
FieldType.C_NCHAR : _crow_nchar_to_python_block,
FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
FieldType.C_NCHAR: _crow_nchar_to_python_block,
FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
}
# Corresponding TAOS_FIELD structure in C
class TaosField(ctypes.Structure):
_fields_ = [('name', ctypes.c_char * 65),
('type', ctypes.c_char),
('bytes', ctypes.c_short)]
# C interface class
class CTaosInterface(object):
libtaos = ctypes.CDLL('libtaos.so')
@ -256,7 +360,7 @@ class CTaosInterface(object):
except AttributeError:
raise AttributeError("config is expected as a str")
if config != None:
if config is not None:
CTaosInterface.libtaos.taos_options(3, self._config)
CTaosInterface.libtaos.taos_init()
@ -267,7 +371,13 @@ class CTaosInterface(object):
"""
return self._config
def connect(self, host=None, user="root", password="taosdata", db=None, port=0):
def connect(
self,
host=None,
user="root",
password="taosdata",
db=None,
port=0):
'''
Function to connect to server
@ -276,7 +386,7 @@ class CTaosInterface(object):
# host
try:
_host = ctypes.c_char_p(host.encode(
"utf-8")) if host != None else ctypes.c_char_p(None)
"utf-8")) if host is not None else ctypes.c_char_p(None)
except AttributeError:
raise AttributeError("host is expected as a str")
@ -295,7 +405,7 @@ class CTaosInterface(object):
# db
try:
_db = ctypes.c_char_p(
db.encode("utf-8")) if db != None else ctypes.c_char_p(None)
db.encode("utf-8")) if db is not None else ctypes.c_char_p(None)
except AttributeError:
raise AttributeError("db is expected as a str")
@ -308,11 +418,11 @@ class CTaosInterface(object):
connection = ctypes.c_void_p(CTaosInterface.libtaos.taos_connect(
_host, _user, _password, _db, _port))
if connection.value == None:
if connection.value is None:
print('connect to TDengine failed')
raise ConnectionError("connect to TDengine failed")
# sys.exit(1)
#else:
# else:
# print('connect to TDengine success')
return connection
@ -333,7 +443,8 @@ class CTaosInterface(object):
@rtype: 0 on success and -1 on failure
'''
try:
return CTaosInterface.libtaos.taos_query(connection, ctypes.c_char_p(sql.encode('utf-8')))
return CTaosInterface.libtaos.taos_query(
connection, ctypes.c_char_p(sql.encode('utf-8')))
except AttributeError:
raise AttributeError("sql is expected as a string")
# finally:
@ -348,7 +459,7 @@ class CTaosInterface(object):
@staticmethod
def subscribe(connection, restart, topic, sql, interval):
"""Create a subscription
@restart boolean,
@restart boolean,
@sql string, sql statement for data query, must be a 'select' statement.
@topic string, name of this subscription
"""
@ -400,35 +511,49 @@ class CTaosInterface(object):
result, ctypes.byref(pblock))
if num_of_rows == 0:
return None, 0
isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [ele for ele in ctypes.cast(fieldL, ctypes.POINTER(ctypes.c_int))[:len(fields)]]
fieldLen = [
ele for ele in ctypes.cast(
fieldL, ctypes.POINTER(
ctypes.c_int))[
:len(fields)]]
for i in range(len(fields)):
data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
if fields[i]['type'] not in _CONVERT_FUNC_BLOCK:
raise DatabaseError("Invalid data type returned from database")
blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
return blocks, abs(num_of_rows)
@staticmethod
def fetchRow(result, fields):
pblock = ctypes.c_void_p(0)
pblock = CTaosInterface.libtaos.taos_fetch_row(result)
if pblock :
pblock = CTaosInterface.libtaos.taos_fetch_row(result)
if pblock:
num_of_rows = 1
isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [ele for ele in ctypes.cast(fieldL, ctypes.POINTER(ctypes.c_int))[:len(fields)]]
fieldLen = [
ele for ele in ctypes.cast(
fieldL, ctypes.POINTER(
ctypes.c_int))[
:len(fields)]]
for i in range(len(fields)):
data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
if fields[i]['type'] not in _CONVERT_FUNC:
raise DatabaseError("Invalid data type returned from database")
raise DatabaseError(
"Invalid data type returned from database")
if data is None:
blocks[i] = [None]
else:
blocks[i] = _CONVERT_FUNC[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
blocks[i] = _CONVERT_FUNC[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
else:
return None, 0
return blocks, abs(num_of_rows)

17
src/connector/python/linux/python3/taos/connection.py
View File

@ -2,9 +2,11 @@ from .cursor import TDengineCursor
from .subscription import TDengineSubscription
from .cinterface import CTaosInterface
class TDengineConnection(object):
""" TDengine connection object
"""
def __init__(self, *args, **kwargs):
self._conn = None
self._host = None
@ -29,7 +31,7 @@ class TDengineConnection(object):
# password
if 'password' in kwargs:
self._password = kwargs['password']
# database
if 'database' in kwargs:
self._database = kwargs['database']
@ -43,7 +45,12 @@ class TDengineConnection(object):
self._config = kwargs['config']
self._chandle = CTaosInterface(self._config)
self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
self._conn = self._chandle.connect(
self._host,
self._user,
self._password,
self._database,
self._port)
def close(self):
"""Close current connection.
@ -55,7 +62,8 @@ class TDengineConnection(object):
"""
if self._conn is None:
return None
sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
sub = CTaosInterface.subscribe(
self._conn, restart, topic, sql, interval)
return TDengineSubscription(sub)
def cursor(self):
@ -80,7 +88,8 @@ class TDengineConnection(object):
"""
pass
if __name__ == "__main__":
conn = TDengineConnection(host='192.168.1.107')
conn.close()
print("Hello world")
print("Hello world")

1
src/connector/python/linux/python3/taos/constants.py
View File

@ -3,6 +3,7 @@
from .dbapi import *
class FieldType(object):
"""TDengine Field Types
"""

32
src/connector/python/linux/python3/taos/cursor.py
View File

@ -5,6 +5,7 @@ import threading
# querySeqNum = 0
class TDengineCursor(object):
"""Database cursor which is used to manage the context of a fetch operation.
@ -107,8 +108,8 @@ class TDengineCursor(object):
# if threading.get_ident() != self._threadId:
# info ="Cursor execute:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
# raise OperationalError(info)
# print(info)
# return None
# print(info)
# return None
if not operation:
return None
@ -137,8 +138,8 @@ class TDengineCursor(object):
if errno == 0:
if CTaosInterface.fieldsCount(self._result) == 0:
self._affected_rows += CTaosInterface.affectedRows(
self._result )
return CTaosInterface.affectedRows(self._result )
self._result)
return CTaosInterface.affectedRows(self._result)
else:
self._fields = CTaosInterface.useResult(
self._result)
@ -216,10 +217,13 @@ class TDengineCursor(object):
buffer = [[] for i in range(len(self._fields))]
self._rowcount = 0
while True:
block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
block, num_of_fields = CTaosInterface.fetchRow(
self._result, self._fields)
errno = CTaosInterface.libtaos.taos_errno(self._result)
if errno != 0:
raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
raise ProgrammingError(
CTaosInterface.errStr(
self._result), errno)
if num_of_fields == 0:
break
self._rowcount += num_of_fields
@ -234,15 +238,20 @@ class TDengineCursor(object):
buffer = [[] for i in range(len(self._fields))]
self._rowcount = 0
while True:
block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
block, num_of_fields = CTaosInterface.fetchBlock(
self._result, self._fields)
errno = CTaosInterface.libtaos.taos_errno(self._result)
if errno != 0:
raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
if num_of_fields == 0: break
raise ProgrammingError(
CTaosInterface.errStr(
self._result), errno)
if num_of_fields == 0:
break
self._rowcount += num_of_fields
for i in range(len(self._fields)):
buffer[i].extend(block[i])
return list(map(tuple, zip(*buffer)))
def nextset(self):
"""
"""
@ -274,8 +283,8 @@ class TDengineCursor(object):
# if threading.get_ident() != self._threadId:
# info = "Cursor handleresult:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
# raise OperationalError(info)
# print(info)
# return None
# print(info)
# return None
self._description = []
for ele in self._fields:
@ -283,4 +292,3 @@ class TDengineCursor(object):
(ele['name'], ele['type'], None, None, None, None, False))
return self._result

8
src/connector/python/linux/python3/taos/dbapi.py
View File

@ -4,6 +4,7 @@
import time
import datetime
class DBAPITypeObject(object):
def __init__(self, *values):
self.values = values
@ -16,23 +17,28 @@ class DBAPITypeObject(object):
else:
return -1
Date = datetime.date
Time = datetime.time
Timestamp = datetime.datetime
def DataFromTicks(ticks):
return Date(*time.localtime(ticks)[:3])
def TimeFromTicks(ticks):
return Time(*time.localtime(ticks)[3:6])
def TimestampFromTicks(ticks):
return Timestamp(*time.localtime(ticks)[:6])
Binary = bytes
# STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
# BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
# NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
# DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
# ROWID = DBAPITypeObject()
# ROWID = DBAPITypeObject()

17
src/connector/python/linux/python3/taos/error.py
View File

@ -1,35 +1,41 @@
"""Python exceptions
"""
class Error(Exception):
def __init__(self, msg=None, errno=None):
self.msg = msg
self._full_msg = self.msg
self.errno = errno
def __str__(self):
return self._full_msg
class Warning(Exception):
"""Exception raised for important warnings like data truncations while inserting.
"""
pass
class InterfaceError(Error):
"""Exception raised for errors that are related to the database interface rather than the database itself.
"""Exception raised for errors that are related to the database interface rather than the database itself.
"""
pass
class DatabaseError(Error):
"""Exception raised for errors that are related to the database.
"""Exception raised for errors that are related to the database.
"""
pass
class DataError(DatabaseError):
"""Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
"""
pass
class OperationalError(DatabaseError):
"""Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
"""
@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
"""
pass
class InternalError(DatabaseError):
"""Exception raised when the database encounters an internal error.
"""
pass
class ProgrammingError(DatabaseError):
"""Exception raised for programming errors.
"""
pass
class NotSupportedError(DatabaseError):
"""Exception raised in case a method or database API was used which is not supported by the database,.
"""
pass
pass

21
src/connector/python/linux/python3/taos/subscription.py
View File

@ -1,32 +1,33 @@
from .cinterface import CTaosInterface
from .error import *
class TDengineSubscription(object):
"""TDengine subscription object
"""
def __init__(self, sub):
self._sub = sub
def consume(self):
"""Consume rows of a subscription
"""
if self._sub is None:
raise OperationalError("Invalid use of consume")
result, fields = CTaosInterface.consume(self._sub)
buffer = [[] for i in range(len(fields))]
while True:
block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
if num_of_fields == 0: break
if num_of_fields == 0:
break
for i in range(len(fields)):
buffer[i].extend(block[i])
self.fields = fields
return list(map(tuple, zip(*buffer)))
def close(self, keepProgress = True):
def close(self, keepProgress=True):
"""Close the Subscription.
"""
if self._sub is None:
@ -38,15 +39,19 @@ class TDengineSubscription(object):
if __name__ == '__main__':
from .connection import TDengineConnection
conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
conn = TDengineConnection(
host="127.0.0.1",
user="root",
password="taosdata",
database="test")
# Generate a cursor object to run SQL commands
sub = conn.subscribe(True, "test", "select * from meters;", 1000)
for i in range(0,10):
for i in range(0, 10):
data = sub.consume()
for d in data:
print(d)
sub.close()
conn.close()
conn.close()

1
src/connector/python/osx/python3/taos/__init__.py
View File

@ -8,6 +8,7 @@ paramstyle = 'pyformat'
__all__ = ['connection', 'cursor']
def connect(*args, **kwargs):
""" Function to return a TDengine connector object

299
src/connector/python/osx/python3/taos/cinterface.py
View File

@ -4,11 +4,14 @@ from .error import *
import math
import datetime
def _convert_millisecond_to_datetime(milli):
return datetime.datetime.fromtimestamp(milli/1000.0)
return datetime.datetime.fromtimestamp(milli / 1000.0)
def _convert_microsecond_to_datetime(micro):
return datetime.datetime.fromtimestamp(micro/1000000.0)
return datetime.datetime.fromtimestamp(micro / 1000000.0)
def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bool row to python row
@ -18,208 +21,309 @@ def _crow_timestamp_to_python(data, num_of_rows, nbytes=None, micro=False):
_timestamp_converter = _convert_microsecond_to_datetime
if num_of_rows > 0:
return list(map(_timestamp_converter, ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
return list(map(_timestamp_converter, ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
else:
return list(map(_timestamp_converter, ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
return list(map(_timestamp_converter, ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]))
def _crow_bool_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bool row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_bool))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BOOL_NULL else bool(ele) for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_bool))[
:abs(num_of_rows)]]
def _crow_tinyint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C tinyint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_TINYINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)]]
def _crow_tinyint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_tinyint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
"""Function to convert C tinyint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_byte))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_TINYINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_byte))[
:abs(num_of_rows)]]
def _crow_smallint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C smallint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
return [
None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_SMALLINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
def _crow_smallint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_smallint_unsigned_to_python(
data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C smallint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)]]
return [
None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_short))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_SMALLINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_short))[
:abs(num_of_rows)]]
def _crow_int_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C int row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_INT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)]]
def _crow_int_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C int row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_int))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_int))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_INT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_int))[
:abs(num_of_rows)]]
def _crow_bigint_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C bigint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [None if ele == FieldType.C_BIGINT_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)]]
def _crow_bigint_unsigned_to_python(data, num_of_rows, nbytes=None, micro=False):
def _crow_bigint_unsigned_to_python(
data,
num_of_rows,
nbytes=None,
micro=False):
"""Function to convert C bigint row to python row
"""
if num_of_rows > 0:
return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_long))[
:abs(num_of_rows)]]
else:
return [ None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_long))[:abs(num_of_rows)] ]
return [
None if ele == FieldType.C_BIGINT_UNSIGNED_NULL else ele for ele in ctypes.cast(
data, ctypes.POINTER(
ctypes.c_long))[
:abs(num_of_rows)]]
def _crow_float_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C float row to python row
"""
if num_of_rows > 0:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
else:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_float))[:abs(num_of_rows)]]
def _crow_double_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C double row to python row
"""
if num_of_rows > 0:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
else:
return [ None if math.isnan(ele) else ele for ele in ctypes.cast(data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)] ]
return [None if math.isnan(ele) else ele for ele in ctypes.cast(
data, ctypes.POINTER(ctypes.c_double))[:abs(num_of_rows)]]
def _crow_binary_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
if num_of_rows > 0:
return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
else:
return [ None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode('utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
return [None if ele.value[0:1] == FieldType.C_BINARY_NULL else ele.value.decode(
'utf-8') for ele in (ctypes.cast(data, ctypes.POINTER(ctypes.c_char * nbytes)))[:abs(num_of_rows)]]
def _crow_nchar_to_python(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
res=[]
res = []
for i in range(abs(num_of_rows)):
try:
if num_of_rows >= 0:
tmpstr = ctypes.c_char_p(data)
res.append( tmpstr.value.decode() )
res.append(tmpstr.value.decode())
else:
res.append( (ctypes.cast(data+nbytes*i, ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
res.append((ctypes.cast(data + nbytes * i,
ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
except ValueError:
res.append(None)
return res
return res
def _crow_binary_to_python_block(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C binary row to python row
"""
assert(nbytes is not None)
res=[]
res = []
if num_of_rows > 0:
for i in range(abs(num_of_rows)):
try:
rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode()[0:rbyte] )
rbyte = ctypes.cast(
data + nbytes * i,
ctypes.POINTER(
ctypes.c_short))[
:1].pop()
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode()[0:rbyte])
except ValueError:
res.append(None)
else:
for i in range(abs(num_of_rows)):
try:
rbyte=ctypes.cast(data+nbytes*i,ctypes.POINTER(ctypes.c_short))[:1].pop()
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode()[0:rbyte] )
rbyte = ctypes.cast(
data + nbytes * i,
ctypes.POINTER(
ctypes.c_short))[
:1].pop()
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode()[0:rbyte])
except ValueError:
res.append(None)
return res
def _crow_nchar_to_python_block(data, num_of_rows, nbytes=None, micro=False):
"""Function to convert C nchar row to python row
"""
assert(nbytes is not None)
res=[]
res = []
if num_of_rows >= 0:
for i in range(abs(num_of_rows)):
try:
tmpstr = ctypes.c_char_p(data+nbytes*i+2)
res.append( tmpstr.value.decode() )
tmpstr = ctypes.c_char_p(data + nbytes * i + 2)
res.append(tmpstr.value.decode())
except ValueError:
res.append(None)
else:
for i in range(abs(num_of_rows)):
try:
res.append( (ctypes.cast(data+nbytes*i+2, ctypes.POINTER(ctypes.c_wchar * (nbytes//4))))[0].value )
res.append((ctypes.cast(data + nbytes * i + 2,
ctypes.POINTER(ctypes.c_wchar * (nbytes // 4))))[0].value)
except ValueError:
res.append(None)
return res
_CONVERT_FUNC = {
FieldType.C_BOOL: _crow_bool_to_python,
FieldType.C_TINYINT : _crow_tinyint_to_python,
FieldType.C_SMALLINT : _crow_smallint_to_python,
FieldType.C_INT : _crow_int_to_python,
FieldType.C_BIGINT : _crow_bigint_to_python,
FieldType.C_FLOAT : _crow_float_to_python,
FieldType.C_DOUBLE : _crow_double_to_python,
FieldType.C_TINYINT: _crow_tinyint_to_python,
FieldType.C_SMALLINT: _crow_smallint_to_python,
FieldType.C_INT: _crow_int_to_python,
FieldType.C_BIGINT: _crow_bigint_to_python,
FieldType.C_FLOAT: _crow_float_to_python,
FieldType.C_DOUBLE: _crow_double_to_python,
FieldType.C_BINARY: _crow_binary_to_python,
FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
FieldType.C_NCHAR : _crow_nchar_to_python,
FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
FieldType.C_NCHAR: _crow_nchar_to_python,
FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
}
_CONVERT_FUNC_BLOCK = {
FieldType.C_BOOL: _crow_bool_to_python,
FieldType.C_TINYINT : _crow_tinyint_to_python,
FieldType.C_SMALLINT : _crow_smallint_to_python,
FieldType.C_INT : _crow_int_to_python,
FieldType.C_BIGINT : _crow_bigint_to_python,
FieldType.C_FLOAT : _crow_float_to_python,
FieldType.C_DOUBLE : _crow_double_to_python,
FieldType.C_TINYINT: _crow_tinyint_to_python,
FieldType.C_SMALLINT: _crow_smallint_to_python,
FieldType.C_INT: _crow_int_to_python,
FieldType.C_BIGINT: _crow_bigint_to_python,
FieldType.C_FLOAT: _crow_float_to_python,
FieldType.C_DOUBLE: _crow_double_to_python,
FieldType.C_BINARY: _crow_binary_to_python_block,
FieldType.C_TIMESTAMP : _crow_timestamp_to_python,
FieldType.C_NCHAR : _crow_nchar_to_python_block,
FieldType.C_TINYINT_UNSIGNED : _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED : _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED : _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED : _crow_bigint_unsigned_to_python
FieldType.C_TIMESTAMP: _crow_timestamp_to_python,
FieldType.C_NCHAR: _crow_nchar_to_python_block,
FieldType.C_TINYINT_UNSIGNED: _crow_tinyint_unsigned_to_python,
FieldType.C_SMALLINT_UNSIGNED: _crow_smallint_unsigned_to_python,
FieldType.C_INT_UNSIGNED: _crow_int_unsigned_to_python,
FieldType.C_BIGINT_UNSIGNED: _crow_bigint_unsigned_to_python
}
# Corresponding TAOS_FIELD structure in C
class TaosField(ctypes.Structure):
_fields_ = [('name', ctypes.c_char * 65),
('type', ctypes.c_char),
('bytes', ctypes.c_short)]
# C interface class
class CTaosInterface(object):
libtaos = ctypes.CDLL('libtaos.dylib')
@ -256,7 +360,7 @@ class CTaosInterface(object):
except AttributeError:
raise AttributeError("config is expected as a str")
if config != None:
if config is not None:
CTaosInterface.libtaos.taos_options(3, self._config)
CTaosInterface.libtaos.taos_init()
@ -267,7 +371,13 @@ class CTaosInterface(object):
"""
return self._config
def connect(self, host=None, user="root", password="taosdata", db=None, port=0):
def connect(
self,
host=None,
user="root",
password="taosdata",
db=None,
port=0):
'''
Function to connect to server
@ -276,7 +386,7 @@ class CTaosInterface(object):
# host
try:
_host = ctypes.c_char_p(host.encode(
"utf-8")) if host != None else ctypes.c_char_p(None)
"utf-8")) if host is not None else ctypes.c_char_p(None)
except AttributeError:
raise AttributeError("host is expected as a str")
@ -295,7 +405,7 @@ class CTaosInterface(object):
# db
try:
_db = ctypes.c_char_p(
db.encode("utf-8")) if db != None else ctypes.c_char_p(None)
db.encode("utf-8")) if db is not None else ctypes.c_char_p(None)
except AttributeError:
raise AttributeError("db is expected as a str")
@ -308,11 +418,11 @@ class CTaosInterface(object):
connection = ctypes.c_void_p(CTaosInterface.libtaos.taos_connect(
_host, _user, _password, _db, _port))
if connection.value == None:
if connection.value is None:
print('connect to TDengine failed')
raise ConnectionError("connect to TDengine failed")
# sys.exit(1)
#else:
# else:
# print('connect to TDengine success')
return connection
@ -333,7 +443,8 @@ class CTaosInterface(object):
@rtype: 0 on success and -1 on failure
'''
try:
return CTaosInterface.libtaos.taos_query(connection, ctypes.c_char_p(sql.encode('utf-8')))
return CTaosInterface.libtaos.taos_query(
connection, ctypes.c_char_p(sql.encode('utf-8')))
except AttributeError:
raise AttributeError("sql is expected as a string")
# finally:
@ -348,7 +459,7 @@ class CTaosInterface(object):
@staticmethod
def subscribe(connection, restart, topic, sql, interval):
"""Create a subscription
@restart boolean,
@restart boolean,
@sql string, sql statement for data query, must be a 'select' statement.
@topic string, name of this subscription
"""
@ -400,35 +511,49 @@ class CTaosInterface(object):
result, ctypes.byref(pblock))
if num_of_rows == 0:
return None, 0
isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [ele for ele in ctypes.cast(fieldL, ctypes.POINTER(ctypes.c_int))[:len(fields)]]
fieldLen = [
ele for ele in ctypes.cast(
fieldL, ctypes.POINTER(
ctypes.c_int))[
:len(fields)]]
for i in range(len(fields)):
data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
if fields[i]['type'] not in _CONVERT_FUNC_BLOCK:
raise DatabaseError("Invalid data type returned from database")
blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
blocks[i] = _CONVERT_FUNC_BLOCK[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
return blocks, abs(num_of_rows)
@staticmethod
def fetchRow(result, fields):
pblock = ctypes.c_void_p(0)
pblock = CTaosInterface.libtaos.taos_fetch_row(result)
if pblock :
pblock = CTaosInterface.libtaos.taos_fetch_row(result)
if pblock:
num_of_rows = 1
isMicro = (CTaosInterface.libtaos.taos_result_precision(result) == FieldType.C_TIMESTAMP_MICRO)
isMicro = (CTaosInterface.libtaos.taos_result_precision(
result) == FieldType.C_TIMESTAMP_MICRO)
blocks = [None] * len(fields)
fieldL = CTaosInterface.libtaos.taos_fetch_lengths(result)
fieldLen = [ele for ele in ctypes.cast(fieldL, ctypes.POINTER(ctypes.c_int))[:len(fields)]]
fieldLen = [
ele for ele in ctypes.cast(
fieldL, ctypes.POINTER(
ctypes.c_int))[
:len(fields)]]
for i in range(len(fields)):
data = ctypes.cast(pblock, ctypes.POINTER(ctypes.c_void_p))[i]
if fields[i]['type'] not in _CONVERT_FUNC:
raise DatabaseError("Invalid data type returned from database")
raise DatabaseError(
"Invalid data type returned from database")
if data is None:
blocks[i] = [None]
else:
blocks[i] = _CONVERT_FUNC[fields[i]['type']](data, num_of_rows, fieldLen[i], isMicro)
blocks[i] = _CONVERT_FUNC[fields[i]['type']](
data, num_of_rows, fieldLen[i], isMicro)
else:
return None, 0
return blocks, abs(num_of_rows)

17
src/connector/python/osx/python3/taos/connection.py
View File

@ -2,9 +2,11 @@ from .cursor import TDengineCursor
from .subscription import TDengineSubscription
from .cinterface import CTaosInterface
class TDengineConnection(object):
""" TDengine connection object
"""
def __init__(self, *args, **kwargs):
self._conn = None
self._host = None
@ -29,7 +31,7 @@ class TDengineConnection(object):
# password
if 'password' in kwargs:
self._password = kwargs['password']
# database
if 'database' in kwargs:
self._database = kwargs['database']
@ -43,7 +45,12 @@ class TDengineConnection(object):
self._config = kwargs['config']
self._chandle = CTaosInterface(self._config)
self._conn = self._chandle.connect(self._host, self._user, self._password, self._database, self._port)
self._conn = self._chandle.connect(
self._host,
self._user,
self._password,
self._database,
self._port)
def close(self):
"""Close current connection.
@ -55,7 +62,8 @@ class TDengineConnection(object):
"""
if self._conn is None:
return None
sub = CTaosInterface.subscribe(self._conn, restart, topic, sql, interval)
sub = CTaosInterface.subscribe(
self._conn, restart, topic, sql, interval)
return TDengineSubscription(sub)
def cursor(self):
@ -80,7 +88,8 @@ class TDengineConnection(object):
"""
pass
if __name__ == "__main__":
conn = TDengineConnection(host='192.168.1.107')
conn.close()
print("Hello world")
print("Hello world")

1
src/connector/python/osx/python3/taos/constants.py
View File

@ -3,6 +3,7 @@
from .dbapi import *
class FieldType(object):
"""TDengine Field Types
"""

32
src/connector/python/osx/python3/taos/cursor.py
View File

@ -5,6 +5,7 @@ import threading
# querySeqNum = 0
class TDengineCursor(object):
"""Database cursor which is used to manage the context of a fetch operation.
@ -107,8 +108,8 @@ class TDengineCursor(object):
# if threading.get_ident() != self._threadId:
# info ="Cursor execute:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
# raise OperationalError(info)
# print(info)
# return None
# print(info)
# return None
if not operation:
return None
@ -137,8 +138,8 @@ class TDengineCursor(object):
if errno == 0:
if CTaosInterface.fieldsCount(self._result) == 0:
self._affected_rows += CTaosInterface.affectedRows(
self._result )
return CTaosInterface.affectedRows(self._result )
self._result)
return CTaosInterface.affectedRows(self._result)
else:
self._fields = CTaosInterface.useResult(
self._result)
@ -216,10 +217,13 @@ class TDengineCursor(object):
buffer = [[] for i in range(len(self._fields))]
self._rowcount = 0
while True:
block, num_of_fields = CTaosInterface.fetchRow(self._result, self._fields)
block, num_of_fields = CTaosInterface.fetchRow(
self._result, self._fields)
errno = CTaosInterface.libtaos.taos_errno(self._result)
if errno != 0:
raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
raise ProgrammingError(
CTaosInterface.errStr(
self._result), errno)
if num_of_fields == 0:
break
self._rowcount += num_of_fields
@ -234,15 +238,20 @@ class TDengineCursor(object):
buffer = [[] for i in range(len(self._fields))]
self._rowcount = 0
while True:
block, num_of_fields = CTaosInterface.fetchBlock(self._result, self._fields)
block, num_of_fields = CTaosInterface.fetchBlock(
self._result, self._fields)
errno = CTaosInterface.libtaos.taos_errno(self._result)
if errno != 0:
raise ProgrammingError(CTaosInterface.errStr(self._result), errno)
if num_of_fields == 0: break
raise ProgrammingError(
CTaosInterface.errStr(
self._result), errno)
if num_of_fields == 0:
break
self._rowcount += num_of_fields
for i in range(len(self._fields)):
buffer[i].extend(block[i])
return list(map(tuple, zip(*buffer)))
def nextset(self):
"""
"""
@ -274,8 +283,8 @@ class TDengineCursor(object):
# if threading.get_ident() != self._threadId:
# info = "Cursor handleresult:Thread ID not match,creater:"+str(self._threadId)+" caller:"+str(threading.get_ident())
# raise OperationalError(info)
# print(info)
# return None
# print(info)
# return None
self._description = []
for ele in self._fields:
@ -283,4 +292,3 @@ class TDengineCursor(object):
(ele['name'], ele['type'], None, None, None, None, False))
return self._result

8
src/connector/python/osx/python3/taos/dbapi.py
View File

@ -4,6 +4,7 @@
import time
import datetime
class DBAPITypeObject(object):
def __init__(self, *values):
self.values = values
@ -16,23 +17,28 @@ class DBAPITypeObject(object):
else:
return -1
Date = datetime.date
Time = datetime.time
Timestamp = datetime.datetime
def DataFromTicks(ticks):
return Date(*time.localtime(ticks)[:3])
def TimeFromTicks(ticks):
return Time(*time.localtime(ticks)[3:6])
def TimestampFromTicks(ticks):
return Timestamp(*time.localtime(ticks)[:6])
Binary = bytes
# STRING = DBAPITypeObject(*constants.FieldType.get_string_types())
# BINARY = DBAPITypeObject(*constants.FieldType.get_binary_types())
# NUMBER = BAPITypeObject(*constants.FieldType.get_number_types())
# DATETIME = DBAPITypeObject(*constants.FieldType.get_timestamp_types())
# ROWID = DBAPITypeObject()
# ROWID = DBAPITypeObject()

17
src/connector/python/osx/python3/taos/error.py
View File

@ -1,35 +1,41 @@
"""Python exceptions
"""
class Error(Exception):
def __init__(self, msg=None, errno=None):
self.msg = msg
self._full_msg = self.msg
self.errno = errno
def __str__(self):
return self._full_msg
class Warning(Exception):
"""Exception raised for important warnings like data truncations while inserting.
"""
pass
class InterfaceError(Error):
"""Exception raised for errors that are related to the database interface rather than the database itself.
"""Exception raised for errors that are related to the database interface rather than the database itself.
"""
pass
class DatabaseError(Error):
"""Exception raised for errors that are related to the database.
"""Exception raised for errors that are related to the database.
"""
pass
class DataError(DatabaseError):
"""Exception raised for errors that are due to problems with the processed data like division by zero, numeric value out of range.
"""
pass
class OperationalError(DatabaseError):
"""Exception raised for errors that are related to the database's operation and not necessarily under the control of the programmer
"""
@ -41,17 +47,20 @@ class IntegrityError(DatabaseError):
"""
pass
class InternalError(DatabaseError):
"""Exception raised when the database encounters an internal error.
"""
pass
class ProgrammingError(DatabaseError):
"""Exception raised for programming errors.
"""
pass
class NotSupportedError(DatabaseError):
"""Exception raised in case a method or database API was used which is not supported by the database,.
"""
pass
pass

21
src/connector/python/osx/python3/taos/subscription.py
View File

@ -1,32 +1,33 @@
from .cinterface import CTaosInterface
from .error import *
class TDengineSubscription(object):
"""TDengine subscription object
"""
def __init__(self, sub):
self._sub = sub
def consume(self):
"""Consume rows of a subscription
"""
if self._sub is None:
raise OperationalError("Invalid use of consume")
result, fields = CTaosInterface.consume(self._sub)
buffer = [[] for i in range(len(fields))]
while True:
block, num_of_fields = CTaosInterface.fetchBlock(result, fields)
if num_of_fields == 0: break
if num_of_fields == 0:
break
for i in range(len(fields)):
buffer[i].extend(block[i])
self.fields = fields
return list(map(tuple, zip(*buffer)))
def close(self, keepProgress = True):
def close(self, keepProgress=True):
"""Close the Subscription.
"""
if self._sub is None:
@ -38,15 +39,19 @@ class TDengineSubscription(object):
if __name__ == '__main__':
from .connection import TDengineConnection
conn = TDengineConnection(host="127.0.0.1", user="root", password="taosdata", database="test")
conn = TDengineConnection(
host="127.0.0.1",
user="root",
password="taosdata",
database="test")
# Generate a cursor object to run SQL commands
sub = conn.subscribe(True, "test", "select * from meters;", 1000)
for i in range(0,10):
for i in range(0, 10):
data = sub.consume()
for d in data:
print(d)
sub.close()
conn.close()
conn.close()

3
tests/pytest/insert/basic_unsigned.py
View File

@ -25,7 +25,8 @@ class TDTestCase:
def run(self):
tdSql.prepare()
ret = tdSql.execute('create table tb (ts timestamp, speed int unsigned)')
ret = tdSql.execute(
'create table tb (ts timestamp, speed int unsigned)')
insertRows = 10
tdLog.info("insert %d rows" % (insertRows))