20 lines
743 B
Python
20 lines
743 B
Python
import pandas
|
|
from sqlalchemy import create_engine
|
|
|
|
engine = create_engine("taosrest://root:taosdata@localhost:6041")
|
|
df: pandas.DataFrame = pandas.read_sql("SELECT * FROM power.meters", engine)
|
|
|
|
# print index
|
|
print(df.index)
|
|
# print data type of element in ts column
|
|
print(type(df.ts[0]))
|
|
print(df.head(3))
|
|
|
|
# output:
|
|
# RangeIndex(start=0, stop=8, step=1)
|
|
# <class 'pandas._libs.tslibs.timestamps.Timestamp'>
|
|
# ts current ... location groupid
|
|
# 0 2018-10-03 06:38:05.500000+00:00 11.8 ... california.losangeles 2
|
|
# 1 2018-10-03 06:38:16.600000+00:00 13.4 ... california.losangeles 2
|
|
# 2 2018-10-03 06:38:05+00:00 10.8 ... california.losangeles 3
|