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bazarr/libs/dogpile/util/compat.py

73 lines
1.7 KiB

import collections
import inspect
FullArgSpec = collections.namedtuple(
"FullArgSpec",
[
"args",
"varargs",
"varkw",
"defaults",
"kwonlyargs",
"kwonlydefaults",
"annotations",
],
)
ArgSpec = collections.namedtuple(
"ArgSpec", ["args", "varargs", "keywords", "defaults"]
)
def inspect_getfullargspec(func):
"""Fully vendored version of getfullargspec from Python 3.3.
This version is more performant than the one which appeared in
later Python 3 versions.
"""
# if a Signature is already present, as is the case with newer
# "decorator" package, defer back to built in
if hasattr(func, "__signature__"):
return inspect.getfullargspec(func)
if inspect.ismethod(func):
func = func.__func__
if not inspect.isfunction(func):
raise TypeError("{!r} is not a Python function".format(func))
co = func.__code__
if not inspect.iscode(co):
raise TypeError("{!r} is not a code object".format(co))
nargs = co.co_argcount
names = co.co_varnames
nkwargs = co.co_kwonlyargcount
args = list(names[:nargs])
kwonlyargs = list(names[nargs : nargs + nkwargs])
nargs += nkwargs
varargs = None
if co.co_flags & inspect.CO_VARARGS:
varargs = co.co_varnames[nargs]
nargs = nargs + 1
varkw = None
if co.co_flags & inspect.CO_VARKEYWORDS:
varkw = co.co_varnames[nargs]
return FullArgSpec(
args,
varargs,
varkw,
func.__defaults__,
kwonlyargs,
func.__kwdefaults__,
func.__annotations__,
)
def inspect_getargspec(func):
return ArgSpec(*inspect_getfullargspec(func)[0:4])