699 lines
24 KiB
Python
699 lines
24 KiB
Python
import py
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import sys, os.path
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builtin_repr = repr
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reprlib = py.builtin._tryimport('repr', 'reprlib')
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class Code(object):
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""" wrapper around Python code objects """
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def __init__(self, rawcode):
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rawcode = py.code.getrawcode(rawcode)
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self.raw = rawcode
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try:
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self.filename = rawcode.co_filename
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self.firstlineno = rawcode.co_firstlineno - 1
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self.name = rawcode.co_name
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except AttributeError:
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raise TypeError("not a code object: %r" %(rawcode,))
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def __eq__(self, other):
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return self.raw == other.raw
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def __ne__(self, other):
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return not self == other
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def path(self):
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""" return a path object pointing to source code"""
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p = py.path.local(self.raw.co_filename)
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if not p.check():
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# XXX maybe try harder like the weird logic
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# in the standard lib [linecache.updatecache] does?
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p = self.raw.co_filename
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return p
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path = property(path, None, None, "path of this code object")
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def fullsource(self):
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""" return a py.code.Source object for the full source file of the code
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"""
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from py._code import source
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full, _ = source.findsource(self.raw)
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return full
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fullsource = property(fullsource, None, None,
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"full source containing this code object")
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def source(self):
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""" return a py.code.Source object for the code object's source only
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"""
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# return source only for that part of code
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return py.code.Source(self.raw)
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def getargs(self):
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""" return a tuple with the argument names for the code object
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"""
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# handfull shortcut for getting args
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raw = self.raw
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return raw.co_varnames[:raw.co_argcount]
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class Frame(object):
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"""Wrapper around a Python frame holding f_locals and f_globals
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in which expressions can be evaluated."""
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def __init__(self, frame):
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self.code = py.code.Code(frame.f_code)
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self.lineno = frame.f_lineno - 1
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self.f_globals = frame.f_globals
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self.f_locals = frame.f_locals
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self.raw = frame
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def statement(self):
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if self.code.fullsource is None:
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return py.code.Source("")
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return self.code.fullsource.getstatement(self.lineno)
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statement = property(statement, None, None,
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"statement this frame is at")
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def eval(self, code, **vars):
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""" evaluate 'code' in the frame
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'vars' are optional additional local variables
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returns the result of the evaluation
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"""
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f_locals = self.f_locals.copy()
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f_locals.update(vars)
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return eval(code, self.f_globals, f_locals)
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def exec_(self, code, **vars):
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""" exec 'code' in the frame
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'vars' are optiona; additional local variables
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"""
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f_locals = self.f_locals.copy()
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f_locals.update(vars)
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py.builtin.exec_(code, self.f_globals, f_locals )
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def repr(self, object):
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""" return a 'safe' (non-recursive, one-line) string repr for 'object'
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"""
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return py.io.saferepr(object)
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def is_true(self, object):
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return object
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def getargs(self):
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""" return a list of tuples (name, value) for all arguments
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"""
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retval = []
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for arg in self.code.getargs():
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try:
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retval.append((arg, self.f_locals[arg]))
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except KeyError:
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pass # this can occur when using Psyco
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return retval
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class TracebackEntry(object):
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""" a single entry in a traceback """
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exprinfo = None
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def __init__(self, rawentry):
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self._rawentry = rawentry
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self.frame = py.code.Frame(rawentry.tb_frame)
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# Ugh. 2.4 and 2.5 differs here when encountering
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# multi-line statements. Not sure about the solution, but
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# should be portable
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self.lineno = rawentry.tb_lineno - 1
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self.relline = self.lineno - self.frame.code.firstlineno
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def __repr__(self):
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return "<TracebackEntry %s:%d>" %(self.frame.code.path, self.lineno+1)
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def statement(self):
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""" return a py.code.Source object for the current statement """
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source = self.frame.code.fullsource
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return source.getstatement(self.lineno)
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statement = property(statement, None, None,
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"statement of this traceback entry.")
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def path(self):
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return self.frame.code.path
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path = property(path, None, None, "path to the full source code")
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def getlocals(self):
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return self.frame.f_locals
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locals = property(getlocals, None, None, "locals of underlaying frame")
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def reinterpret(self):
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"""Reinterpret the failing statement and returns a detailed information
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about what operations are performed."""
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if self.exprinfo is None:
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source = str(self.statement).strip()
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x = py.code._reinterpret(source, self.frame, should_fail=True)
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if not isinstance(x, str):
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raise TypeError("interpret returned non-string %r" % (x,))
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self.exprinfo = x
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return self.exprinfo
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def getfirstlinesource(self):
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return self.frame.code.firstlineno
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def getsource(self):
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""" return failing source code. """
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source = self.frame.code.fullsource
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if source is None:
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return None
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start = self.getfirstlinesource()
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end = self.lineno
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try:
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_, end = source.getstatementrange(end)
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except IndexError:
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end = self.lineno + 1
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# heuristic to stop displaying source on e.g.
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# if something: # assume this causes a NameError
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# # _this_ lines and the one
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# below we don't want from entry.getsource()
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for i in range(self.lineno, end):
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if source[i].rstrip().endswith(':'):
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end = i + 1
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break
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return source[start:end]
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source = property(getsource)
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def ishidden(self):
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""" return True if the current frame has a var __tracebackhide__
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resolving to True
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mostly for internal use
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"""
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try:
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return self.frame.eval("__tracebackhide__")
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except (SystemExit, KeyboardInterrupt):
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raise
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except:
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return False
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def __str__(self):
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try:
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fn = str(self.path)
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except py.error.Error:
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fn = '???'
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name = self.frame.code.name
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try:
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line = str(self.statement).lstrip()
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except KeyboardInterrupt:
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raise
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except:
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line = "???"
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return " File %r:%d in %s\n %s\n" %(fn, self.lineno+1, name, line)
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def name(self):
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return self.frame.code.raw.co_name
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name = property(name, None, None, "co_name of underlaying code")
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class Traceback(list):
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""" Traceback objects encapsulate and offer higher level
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access to Traceback entries.
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"""
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Entry = TracebackEntry
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def __init__(self, tb):
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""" initialize from given python traceback object. """
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if hasattr(tb, 'tb_next'):
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def f(cur):
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while cur is not None:
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yield self.Entry(cur)
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cur = cur.tb_next
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list.__init__(self, f(tb))
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else:
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list.__init__(self, tb)
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def cut(self, path=None, lineno=None, firstlineno=None, excludepath=None):
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""" return a Traceback instance wrapping part of this Traceback
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by provding any combination of path, lineno and firstlineno, the
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first frame to start the to-be-returned traceback is determined
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this allows cutting the first part of a Traceback instance e.g.
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for formatting reasons (removing some uninteresting bits that deal
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with handling of the exception/traceback)
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"""
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for x in self:
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code = x.frame.code
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codepath = code.path
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if ((path is None or codepath == path) and
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(excludepath is None or not hasattr(codepath, 'relto') or
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not codepath.relto(excludepath)) and
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(lineno is None or x.lineno == lineno) and
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(firstlineno is None or x.frame.code.firstlineno == firstlineno)):
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return Traceback(x._rawentry)
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return self
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def __getitem__(self, key):
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val = super(Traceback, self).__getitem__(key)
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if isinstance(key, type(slice(0))):
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val = self.__class__(val)
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return val
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def filter(self, fn=lambda x: not x.ishidden()):
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""" return a Traceback instance with certain items removed
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fn is a function that gets a single argument, a TracebackItem
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instance, and should return True when the item should be added
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to the Traceback, False when not
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by default this removes all the TracebackItems which are hidden
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(see ishidden() above)
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"""
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return Traceback(filter(fn, self))
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def getcrashentry(self):
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""" return last non-hidden traceback entry that lead
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to the exception of a traceback.
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"""
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tb = self.filter()
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if not tb:
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tb = self
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return tb[-1]
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def recursionindex(self):
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""" return the index of the frame/TracebackItem where recursion
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originates if appropriate, None if no recursion occurred
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"""
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cache = {}
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for i, entry in enumerate(self):
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key = entry.frame.code.path, entry.lineno
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#print "checking for recursion at", key
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l = cache.setdefault(key, [])
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if l:
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f = entry.frame
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loc = f.f_locals
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for otherloc in l:
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if f.is_true(f.eval(co_equal,
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__recursioncache_locals_1=loc,
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__recursioncache_locals_2=otherloc)):
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return i
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l.append(entry.frame.f_locals)
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return None
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co_equal = compile('__recursioncache_locals_1 == __recursioncache_locals_2',
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'?', 'eval')
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class ExceptionInfo(object):
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""" wraps sys.exc_info() objects and offers
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help for navigating the traceback.
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"""
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_striptext = ''
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def __init__(self, tup=None, exprinfo=None):
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# NB. all attributes are private! Subclasses or other
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# ExceptionInfo-like classes may have different attributes.
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if tup is None:
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tup = sys.exc_info()
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if exprinfo is None and isinstance(tup[1], py.code._AssertionError):
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exprinfo = getattr(tup[1], 'msg', None)
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if exprinfo is None:
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exprinfo = str(tup[1])
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if exprinfo and exprinfo.startswith('assert '):
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self._striptext = 'AssertionError: '
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self._excinfo = tup
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self.type, self.value, tb = self._excinfo
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self.typename = self.type.__name__
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self.traceback = py.code.Traceback(tb)
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def __repr__(self):
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return "<ExceptionInfo %s tblen=%d>" % (self.typename, len(self.traceback))
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def exconly(self, tryshort=False):
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""" return the exception as a string
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when 'tryshort' resolves to True, and the exception is a
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py.code._AssertionError, only the actual exception part of
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the exception representation is returned (so 'AssertionError: ' is
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removed from the beginning)
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"""
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lines = py.std.traceback.format_exception_only(self.type, self.value)
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text = ''.join(lines)
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text = text.rstrip()
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if tryshort:
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if text.startswith(self._striptext):
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text = text[len(self._striptext):]
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return text
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def errisinstance(self, exc):
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""" return True if the exception is an instance of exc """
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return isinstance(self.value, exc)
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def _getreprcrash(self):
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exconly = self.exconly(tryshort=True)
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entry = self.traceback.getcrashentry()
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path, lineno = entry.path, entry.lineno
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reprcrash = ReprFileLocation(path, lineno+1, exconly)
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return reprcrash
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def getrepr(self, showlocals=False, style="long",
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abspath=False, tbfilter=True, funcargs=False):
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""" return str()able representation of this exception info.
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showlocals: show locals per traceback entry
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style: long|short|no traceback style
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tbfilter: hide entries (where __tracebackhide__ is true)
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"""
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fmt = FormattedExcinfo(showlocals=showlocals, style=style,
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abspath=abspath, tbfilter=tbfilter, funcargs=funcargs)
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return fmt.repr_excinfo(self)
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def __str__(self):
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entry = self.traceback[-1]
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loc = ReprFileLocation(entry.path, entry.lineno + 1, self.exconly())
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return str(loc)
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def __unicode__(self):
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entry = self.traceback[-1]
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loc = ReprFileLocation(entry.path, entry.lineno + 1, self.exconly())
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return unicode(loc)
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class FormattedExcinfo(object):
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""" presenting information about failing Functions and Generators. """
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# for traceback entries
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flow_marker = ">"
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fail_marker = "E"
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def __init__(self, showlocals=False, style="long", abspath=True, tbfilter=True, funcargs=False):
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self.showlocals = showlocals
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self.style = style
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self.tbfilter = tbfilter
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self.funcargs = funcargs
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self.abspath = abspath
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def _getindent(self, source):
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# figure out indent for given source
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try:
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s = str(source.getstatement(len(source)-1))
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except KeyboardInterrupt:
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raise
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except:
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try:
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s = str(source[-1])
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except KeyboardInterrupt:
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raise
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except:
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return 0
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return 4 + (len(s) - len(s.lstrip()))
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def _getentrysource(self, entry):
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source = entry.getsource()
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if source is not None:
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source = source.deindent()
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return source
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def _saferepr(self, obj):
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return py.io.saferepr(obj)
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def repr_args(self, entry):
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if self.funcargs:
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args = []
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for argname, argvalue in entry.frame.getargs():
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args.append((argname, self._saferepr(argvalue)))
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return ReprFuncArgs(args)
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def get_source(self, source, line_index=-1, excinfo=None):
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""" return formatted and marked up source lines. """
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lines = []
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if source is None:
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source = py.code.Source("???")
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line_index = 0
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if line_index < 0:
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line_index += len(source)
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for i in range(len(source)):
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if i == line_index:
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prefix = self.flow_marker + " "
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else:
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prefix = " "
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line = prefix + source[i]
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lines.append(line)
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if excinfo is not None:
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indent = self._getindent(source)
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lines.extend(self.get_exconly(excinfo, indent=indent, markall=True))
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return lines
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def get_exconly(self, excinfo, indent=4, markall=False):
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lines = []
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indent = " " * indent
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# get the real exception information out
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exlines = excinfo.exconly(tryshort=True).split('\n')
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failindent = self.fail_marker + indent[1:]
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for line in exlines:
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lines.append(failindent + line)
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if not markall:
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failindent = indent
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return lines
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def repr_locals(self, locals):
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if self.showlocals:
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lines = []
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keys = list(locals)
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keys.sort()
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for name in keys:
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value = locals[name]
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if name == '__builtins__':
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lines.append("__builtins__ = <builtins>")
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else:
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# This formatting could all be handled by the
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# _repr() function, which is only reprlib.Repr in
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# disguise, so is very configurable.
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str_repr = self._saferepr(value)
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#if len(str_repr) < 70 or not isinstance(value,
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# (list, tuple, dict)):
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lines.append("%-10s = %s" %(name, str_repr))
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#else:
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# self._line("%-10s =\\" % (name,))
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# # XXX
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# py.std.pprint.pprint(value, stream=self.excinfowriter)
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return ReprLocals(lines)
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def repr_traceback_entry(self, entry, excinfo=None):
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# excinfo is not None if this is the last tb entry
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source = self._getentrysource(entry)
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if source is None:
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source = py.code.Source("???")
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line_index = 0
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else:
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# entry.getfirstlinesource() can be -1, should be 0 on jython
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line_index = entry.lineno - max(entry.getfirstlinesource(), 0)
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lines = []
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if self.style == "long":
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reprargs = self.repr_args(entry)
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lines.extend(self.get_source(source, line_index, excinfo))
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message = excinfo and excinfo.typename or ""
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path = self._makepath(entry.path)
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filelocrepr = ReprFileLocation(path, entry.lineno+1, message)
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localsrepr = self.repr_locals(entry.locals)
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return ReprEntry(lines, reprargs, localsrepr, filelocrepr)
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else:
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if self.style == "short":
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line = source[line_index].lstrip()
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basename = os.path.basename(entry.frame.code.filename)
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lines.append(' File "%s", line %d, in %s' % (
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basename, entry.lineno+1, entry.name))
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lines.append(" " + line)
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if excinfo:
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lines.extend(self.get_exconly(excinfo, indent=4))
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return ReprEntry(lines, None, None, None)
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def _makepath(self, path):
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if not self.abspath:
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np = py.path.local().bestrelpath(path)
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if len(np) < len(str(path)):
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path = np
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return path
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def repr_traceback(self, excinfo):
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traceback = excinfo.traceback
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if self.tbfilter:
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traceback = traceback.filter()
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recursionindex = None
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if excinfo.errisinstance(RuntimeError):
|
|
recursionindex = traceback.recursionindex()
|
|
last = traceback[-1]
|
|
entries = []
|
|
extraline = None
|
|
for index, entry in enumerate(traceback):
|
|
einfo = (last == entry) and excinfo or None
|
|
reprentry = self.repr_traceback_entry(entry, einfo)
|
|
entries.append(reprentry)
|
|
if index == recursionindex:
|
|
extraline = "!!! Recursion detected (same locals & position)"
|
|
break
|
|
return ReprTraceback(entries, extraline, style=self.style)
|
|
|
|
def repr_excinfo(self, excinfo):
|
|
reprtraceback = self.repr_traceback(excinfo)
|
|
reprcrash = excinfo._getreprcrash()
|
|
return ReprExceptionInfo(reprtraceback, reprcrash)
|
|
|
|
class TerminalRepr:
|
|
def __str__(self):
|
|
s = self.__unicode__()
|
|
if sys.version_info[0] < 3:
|
|
s = s.encode('utf-8')
|
|
return s
|
|
|
|
def __unicode__(self):
|
|
l = []
|
|
tw = py.io.TerminalWriter(l.append)
|
|
self.toterminal(tw)
|
|
l = map(unicode_or_repr, l)
|
|
return "".join(l).strip()
|
|
|
|
def __repr__(self):
|
|
return "<%s instance at %0x>" %(self.__class__, id(self))
|
|
|
|
def unicode_or_repr(obj):
|
|
try:
|
|
return py.builtin._totext(obj)
|
|
except KeyboardInterrupt:
|
|
raise
|
|
except Exception:
|
|
return "<print-error: %r>" % py.io.saferepr(obj)
|
|
|
|
class ReprExceptionInfo(TerminalRepr):
|
|
def __init__(self, reprtraceback, reprcrash):
|
|
self.reprtraceback = reprtraceback
|
|
self.reprcrash = reprcrash
|
|
self.sections = []
|
|
|
|
def addsection(self, name, content, sep="-"):
|
|
self.sections.append((name, content, sep))
|
|
|
|
def toterminal(self, tw):
|
|
self.reprtraceback.toterminal(tw)
|
|
for name, content, sep in self.sections:
|
|
tw.sep(sep, name)
|
|
tw.line(content)
|
|
|
|
class ReprTraceback(TerminalRepr):
|
|
entrysep = "_ "
|
|
|
|
def __init__(self, reprentries, extraline, style):
|
|
self.reprentries = reprentries
|
|
self.extraline = extraline
|
|
self.style = style
|
|
|
|
def toterminal(self, tw):
|
|
sepok = False
|
|
for entry in self.reprentries:
|
|
if self.style == "long":
|
|
if sepok:
|
|
tw.sep(self.entrysep)
|
|
tw.line("")
|
|
sepok = True
|
|
entry.toterminal(tw)
|
|
if self.extraline:
|
|
tw.line(self.extraline)
|
|
|
|
class ReprEntry(TerminalRepr):
|
|
localssep = "_ "
|
|
|
|
def __init__(self, lines, reprfuncargs, reprlocals, filelocrepr):
|
|
self.lines = lines
|
|
self.reprfuncargs = reprfuncargs
|
|
self.reprlocals = reprlocals
|
|
self.reprfileloc = filelocrepr
|
|
|
|
def toterminal(self, tw):
|
|
if self.reprfuncargs:
|
|
self.reprfuncargs.toterminal(tw)
|
|
for line in self.lines:
|
|
red = line.startswith("E ")
|
|
tw.line(line, bold=True, red=red)
|
|
if self.reprlocals:
|
|
#tw.sep(self.localssep, "Locals")
|
|
tw.line("")
|
|
self.reprlocals.toterminal(tw)
|
|
if self.reprfileloc:
|
|
tw.line("")
|
|
self.reprfileloc.toterminal(tw)
|
|
|
|
def __str__(self):
|
|
return "%s\n%s\n%s" % ("\n".join(self.lines),
|
|
self.reprlocals,
|
|
self.reprfileloc)
|
|
|
|
class ReprFileLocation(TerminalRepr):
|
|
def __init__(self, path, lineno, message):
|
|
self.path = str(path)
|
|
self.lineno = lineno
|
|
self.message = message
|
|
|
|
def toterminal(self, tw):
|
|
# filename and lineno output for each entry,
|
|
# using an output format that most editors unterstand
|
|
msg = self.message
|
|
i = msg.find("\n")
|
|
if i != -1:
|
|
msg = msg[:i]
|
|
tw.line("%s:%s: %s" %(self.path, self.lineno, msg))
|
|
|
|
class ReprLocals(TerminalRepr):
|
|
def __init__(self, lines):
|
|
self.lines = lines
|
|
|
|
def toterminal(self, tw):
|
|
for line in self.lines:
|
|
tw.line(line)
|
|
|
|
class ReprFuncArgs(TerminalRepr):
|
|
def __init__(self, args):
|
|
self.args = args
|
|
|
|
def toterminal(self, tw):
|
|
if self.args:
|
|
linesofar = ""
|
|
for name, value in self.args:
|
|
ns = "%s = %s" %(name, value)
|
|
if len(ns) + len(linesofar) + 2 > tw.fullwidth:
|
|
if linesofar:
|
|
tw.line(linesofar)
|
|
linesofar = ns
|
|
else:
|
|
if linesofar:
|
|
linesofar += ", " + ns
|
|
else:
|
|
linesofar = ns
|
|
if linesofar:
|
|
tw.line(linesofar)
|
|
tw.line("")
|
|
|
|
|
|
|
|
oldbuiltins = {}
|
|
|
|
def patch_builtins(assertion=True, compile=True):
|
|
""" put compile and AssertionError builtins to Python's builtins. """
|
|
if assertion:
|
|
from py._code import assertion
|
|
l = oldbuiltins.setdefault('AssertionError', [])
|
|
l.append(py.builtin.builtins.AssertionError)
|
|
py.builtin.builtins.AssertionError = assertion.AssertionError
|
|
if compile:
|
|
l = oldbuiltins.setdefault('compile', [])
|
|
l.append(py.builtin.builtins.compile)
|
|
py.builtin.builtins.compile = py.code.compile
|
|
|
|
def unpatch_builtins(assertion=True, compile=True):
|
|
""" remove compile and AssertionError builtins from Python builtins. """
|
|
if assertion:
|
|
py.builtin.builtins.AssertionError = oldbuiltins['AssertionError'].pop()
|
|
if compile:
|
|
py.builtin.builtins.compile = oldbuiltins['compile'].pop()
|
|
|
|
def getrawcode(obj):
|
|
""" return code object for given function. """
|
|
obj = getattr(obj, 'im_func', obj)
|
|
obj = getattr(obj, 'func_code', obj)
|
|
obj = getattr(obj, 'f_code', obj)
|
|
obj = getattr(obj, '__code__', obj)
|
|
return obj
|
|
|