1"""Excerpts of six.py"""
2
3# Copyright (C) 2010-2014 Benjamin Peterson
4#
5# Permission is hereby granted, free of charge, to any person obtaining a copy
6# of this software and associated documentation files (the "Software"), to deal
7# in the Software without restriction, including without limitation the rights
8# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
9# copies of the Software, and to permit persons to whom the Software is
10# furnished to do so, subject to the following conditions:
11#
12# The above copyright notice and this permission notice shall be included in all
13# copies or substantial portions of the Software.
14#
15# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21# SOFTWARE.
22
23import sys
24
25# Useful for very coarse version differentiation.
26PY2 = sys.version_info[0] == 2
27PY3 = sys.version_info[0] == 3
28
29if PY3:
30
31    def reraise(tp, value, tb=None):
32        if value.__traceback__ is not tb:
33            raise value.with_traceback(tb)
34        raise value
35
36else:
37    def exec_(_code_, _globs_=None, _locs_=None):
38        """Execute code in a namespace."""
39        if _globs_ is None:
40            frame = sys._getframe(1)
41            _globs_ = frame.f_globals
42            if _locs_ is None:
43                _locs_ = frame.f_locals
44            del frame
45        elif _locs_ is None:
46            _locs_ = _globs_
47        exec("""exec _code_ in _globs_, _locs_""")
48
49
50    exec_("""def reraise(tp, value, tb=None):
51    raise tp, value, tb
52""")
53