85 lines
2.3 KiB
Python
85 lines
2.3 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Copyright(C) 2010 Romain Bignon
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, version 3 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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"""
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from dateutil import tz
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def toUnicode(text):
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r"""
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>>> toUnicode('ascii')
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u'ascii'
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>>> toUnicode(u'utf\xe9'.encode('UTF-8'))
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u'utf\xe9'
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>>> toUnicode(u'unicode')
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u'unicode'
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"""
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if isinstance(text, unicode):
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return text
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if not isinstance(text, str):
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text = str(text)
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try:
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return unicode(text, "utf8")
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except UnicodeError:
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pass
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return unicode(text, "ISO-8859-1")
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def local2utc(d):
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d = d.replace(tzinfo=tz.tzlocal())
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d = d.astimezone(tz.tzutc())
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return d
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def itersubclasses(cls, _seen=None):
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"""
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itersubclasses(cls)
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Generator over all subclasses of a given class, in depth first order.
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>>> list(itersubclasses(int)) == [bool]
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True
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>>> class A(object): pass
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>>> class B(A): pass
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>>> class C(A): pass
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>>> class D(B,C): pass
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>>> class E(D): pass
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>>>
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>>> for cls in itersubclasses(A):
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... print(cls.__name__)
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B
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D
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E
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C
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>>> # get ALL (new-style) classes currently defined
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>>> [cls.__name__ for cls in itersubclasses(object)] #doctest: +ELLIPSIS
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['type', ...'tuple', ...]
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"""
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if not isinstance(cls, type):
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raise TypeError('itersubclasses must be called with '
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'new-style classes, not %.100r' % cls)
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if _seen is None: _seen = set()
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try:
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subs = cls.__subclasses__()
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except TypeError: # fails only when cls is type
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subs = cls.__subclasses__(cls)
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for sub in subs:
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if sub not in _seen:
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_seen.add(sub)
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yield sub
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for sub in itersubclasses(sub, _seen):
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yield sub
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