beets/beets/util/inspect.py
2019-03-06 08:18:28 +01:00

50 lines
1.6 KiB
Python

# -*- coding: utf-8 -*-
# This file is part of beets.
# Copyright 2019, Vladimir Zhelezov.
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
from __future__ import absolute_import
import inspect
from collections import namedtuple
from six import PY2
ArgSpec = namedtuple('ArgSpec', 'args varargs keywords defaults')
def getargspec(func):
if PY2:
return inspect.getargspec(func)
sig = inspect.signature(func)
args = [
p.name for p in sig.parameters.values()
if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD
]
varargs = [
p.name for p in sig.parameters.values()
if p.kind == inspect.Parameter.VAR_POSITIONAL
]
varargs = varargs[0] if varargs else None
varkw = [
p.name for p in sig.parameters.values()
if p.kind == inspect.Parameter.VAR_KEYWORD
]
varkw = varkw[0] if varkw else None
defaults = tuple(p.default for p in sig.parameters.values()
if p.kind == inspect.Parameter.POSITIONAL_OR_KEYWORD
and p.default is not p.empty) or None
return ArgSpec(args, varargs, varkw, defaults)