92 lines
4.1 KiB
Python
92 lines
4.1 KiB
Python
# This code is part of Ansible, but is an independent component.
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# This particular file snippet, and this file snippet only, is BSD licensed.
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# Modules you write using this snippet, which is embedded dynamically by Ansible
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# still belong to the author of the module, and may assign their own license
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# to the complete work.
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#
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# Copyright (c) 2016, Toshio Kuratomi <tkuratomi@ansible.com>
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# Copyright (c) 2015, Marius Gedminas
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#
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# Redistribution and use in source and binary forms, with or without modification,
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# are permitted provided that the following conditions are met:
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#
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# * Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# * Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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# IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
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# USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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from __future__ import (absolute_import, division, print_function)
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__metaclass__ = type
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import sys
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def get_exception():
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"""Get the current exception.
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This code needs to work on Python 2.4 through 3.x, so we cannot use
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"except Exception, e:" (SyntaxError on Python 3.x) nor
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"except Exception as e:" (SyntaxError on Python 2.4-2.5).
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Instead we must use ::
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except Exception:
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e = get_exception()
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"""
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return sys.exc_info()[1]
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try:
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# Python 2.6+
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from ast import literal_eval
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except ImportError:
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# a replacement for literal_eval that works with python 2.4. from:
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# https://mail.python.org/pipermail/python-list/2009-September/551880.html
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# which is essentially a cut/paste from an earlier (2.6) version of python's
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# ast.py
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from compiler import ast, parse
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from ansible.module_utils.six import binary_type, integer_types, string_types, text_type
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def literal_eval(node_or_string):
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"""
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Safely evaluate an expression node or a string containing a Python
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expression. The string or node provided may only consist of the following
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Python literal structures: strings, numbers, tuples, lists, dicts, booleans,
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and None.
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"""
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_safe_names = {'None': None, 'True': True, 'False': False}
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if isinstance(node_or_string, string_types):
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node_or_string = parse(node_or_string, mode='eval')
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if isinstance(node_or_string, ast.Expression):
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node_or_string = node_or_string.node
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def _convert(node):
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if isinstance(node, ast.Const) and isinstance(node.value, (text_type, binary_type, float, complex) + integer_types):
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return node.value
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elif isinstance(node, ast.Tuple):
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return tuple(map(_convert, node.nodes))
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elif isinstance(node, ast.List):
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return list(map(_convert, node.nodes))
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elif isinstance(node, ast.Dict):
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return dict((_convert(k), _convert(v)) for k, v in node.items())
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elif isinstance(node, ast.Name):
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if node.name in _safe_names:
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return _safe_names[node.name]
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elif isinstance(node, ast.UnarySub):
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return -_convert(node.expr) # pylint: disable=invalid-unary-operand-type
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raise ValueError('malformed string')
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return _convert(node_or_string)
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__all__ = ('get_exception', 'literal_eval')
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