82 lines
2.7 KiB
Python
82 lines
2.7 KiB
Python
# Copyright 2011 OpenStack Foundation.
|
|
# All Rights Reserved.
|
|
#
|
|
# Licensed under the Apache License, Version 2.0 (the "License"); you may
|
|
# not use this file except in compliance with the License. You may obtain
|
|
# a copy of the License at
|
|
#
|
|
# http://www.apache.org/licenses/LICENSE-2.0
|
|
#
|
|
# Unless required by applicable law or agreed to in writing, software
|
|
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
|
|
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
|
|
# License for the specific language governing permissions and limitations
|
|
# under the License.
|
|
|
|
"""Utility methods for working with functions/decorators."""
|
|
|
|
import inspect
|
|
|
|
import six
|
|
|
|
|
|
def get_wrapped_function(function):
|
|
"""Get the method at the bottom of a stack of decorators."""
|
|
|
|
if not hasattr(function, six._func_closure) or \
|
|
not six.get_function_closure(function):
|
|
return function
|
|
|
|
def _get_wrapped_function(function):
|
|
if not hasattr(function, six._func_closure):
|
|
return None
|
|
|
|
func_closure = six.get_function_closure(function)
|
|
if not func_closure:
|
|
return None
|
|
|
|
for closure in func_closure:
|
|
func = closure.cell_contents
|
|
|
|
deeper_func = _get_wrapped_function(func)
|
|
if deeper_func:
|
|
return deeper_func
|
|
elif hasattr(closure.cell_contents, '__call__'):
|
|
return closure.cell_contents
|
|
|
|
return _get_wrapped_function(function)
|
|
|
|
|
|
def getcallargs(function, *args, **kwargs):
|
|
"""This is a simplified inspect.getcallargs (2.7+).
|
|
|
|
It should be replaced when python >= 2.7 is standard.
|
|
"""
|
|
|
|
keyed_args = {}
|
|
argnames, varargs, keywords, defaults = inspect.getargspec(function)
|
|
|
|
keyed_args.update(kwargs)
|
|
|
|
# NOTE(alaski) the implicit 'self' or 'cls' argument shows up in
|
|
# argnames but not in args or kwargs. Uses 'in' rather than '==' because
|
|
# some tests use 'self2'.
|
|
if 'self' in argnames[0] or 'cls' == argnames[0]:
|
|
# The function may not actually be a method or have im_self.
|
|
# Typically seen when it's stubbed with mox.
|
|
if inspect.ismethod(function) and hasattr(function, 'im_self'):
|
|
keyed_args[argnames[0]] = function.im_self
|
|
else:
|
|
keyed_args[argnames[0]] = None
|
|
|
|
remaining_argnames = filter(lambda x: x not in keyed_args, argnames)
|
|
keyed_args.update(dict(zip(remaining_argnames, args)))
|
|
|
|
if defaults:
|
|
num_defaults = len(defaults)
|
|
for argname, value in zip(argnames[-num_defaults:], defaults):
|
|
if argname not in keyed_args:
|
|
keyed_args[argname] = value
|
|
|
|
return keyed_args
|