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annotate mercurial/thirdparty/zope/interface/_flatten.py @ 37178:68ee61822182

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thirdparty: port zope.interface to relative imports By using relative imports, we're guaranteed to get modules vendored with Mercurial rather than other random modules that might be in sys.path. My editor strips trailing whitespace on save. So some minor source code cleanup was also performed as part of this commit. # no-check-commit because some modified lines have double newlines Differential Revision: https://phab.mercurial-scm.org/D2930
author Gregory Szorc <gregory.szorc@gmail.com>
date Wed, 21 Mar 2018 19:52:30 -0700
parents 943d77fc07a3
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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943d77fc07a3 thirdparty: vendor zope.interface 4.4.3
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1 ##############################################################################
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2 #
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3 # Copyright (c) 2002 Zope Foundation and Contributors.
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4 # All Rights Reserved.
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5 #
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6 # This software is subject to the provisions of the Zope Public License,
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7 # Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
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8 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
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9 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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10 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
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11 # FOR A PARTICULAR PURPOSE.
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12 #
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13 ##############################################################################
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14 """Adapter-style interface registry
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15
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16 See Adapter class.
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17 """
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68ee61822182 thirdparty: port zope.interface to relative imports
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18
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19 from __future__ import absolute_import
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20
68ee61822182 thirdparty: port zope.interface to relative imports
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21 from .interface import Declaration
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22
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23 def _flatten(implements, include_None=0):
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24
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25 try:
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26 r = implements.flattened()
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27 except AttributeError:
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28 if implements is None:
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29 r=()
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30 else:
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31 r = Declaration(implements).flattened()
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32
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33 if not include_None:
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34 return r
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35
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36 r = list(r)
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37 r.append(None)
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38 return r