71 lines
2.4 KiB
Python
71 lines
2.4 KiB
Python
#
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# Copyright (c) 2014 EUROGICIEL
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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"""Utilities and helper functions that won't produce circular imports."""
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import inspect
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import six
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from cerberus.openstack.common import log
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LOG = log.getLogger(__name__)
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def getcallargs(function, *args, **kwargs):
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"""This is a simplified inspect.getcallargs (2.7+).
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It should be replaced when python >= 2.7 is standard.
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"""
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keyed_args = {}
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argnames, varargs, keywords, defaults = inspect.getargspec(function)
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keyed_args.update(kwargs)
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# NOTE(alaski) the implicit 'self' or 'cls' argument shows up in
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# argnames but not in args or kwargs. Uses 'in' rather than '==' because
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# some tests use 'self2'.
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if 'self' in argnames[0] or 'cls' == argnames[0]:
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# The function may not actually be a method or have im_self.
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# Typically seen when it's stubbed with mox.
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if inspect.ismethod(function) and hasattr(function, 'im_self'):
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keyed_args[argnames[0]] = function.im_self
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else:
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keyed_args[argnames[0]] = None
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remaining_argnames = filter(lambda x: x not in keyed_args, argnames)
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keyed_args.update(dict(zip(remaining_argnames, args)))
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if defaults:
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num_defaults = len(defaults)
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for argname, value in zip(argnames[-num_defaults:], defaults):
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if argname not in keyed_args:
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keyed_args[argname] = value
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return keyed_args
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def safe_rstrip(value, chars=None):
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"""Removes trailing characters from a string if that does not make it empty
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:param value: A string value that will be stripped.
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:param chars: Characters to remove.
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:return: Stripped value.
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"""
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if not isinstance(value, six.string_types):
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LOG.warn(("Failed to remove trailing character. Returning original "
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"object. Supplied object is not a string: %s,") % value)
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return value
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return value.rstrip(chars) or value
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