150 lines
3.9 KiB
Python
150 lines
3.9 KiB
Python
# -*- coding: utf-8 -*-
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"""
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jinja2._compat
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~~~~~~~~~~~~~~
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Some py2/py3 compatibility support based on a stripped down
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version of six so we don't have to depend on a specific version
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of it.
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:copyright: Copyright 2013 by the Jinja team, see AUTHORS.
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:license: BSD, see LICENSE for details.
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"""
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import sys
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PY2 = sys.version_info[0] == 2
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PYPY = hasattr(sys, 'pypy_translation_info')
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_identity = lambda x: x
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if not PY2:
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unichr = chr
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range_type = range
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text_type = str
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string_types = (str,)
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iterkeys = lambda d: iter(d.keys())
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itervalues = lambda d: iter(d.values())
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iteritems = lambda d: iter(d.items())
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import pickle
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from io import BytesIO, StringIO
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NativeStringIO = StringIO
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def reraise(tp, value, tb=None):
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if value.__traceback__ is not tb:
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raise value.with_traceback(tb)
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raise value
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ifilter = filter
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imap = map
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izip = zip
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intern = sys.intern
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implements_iterator = _identity
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implements_to_string = _identity
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encode_filename = _identity
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get_next = lambda x: x.__next__
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else:
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unichr = unichr
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text_type = unicode
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range_type = xrange
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string_types = (str, unicode)
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iterkeys = lambda d: d.iterkeys()
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itervalues = lambda d: d.itervalues()
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iteritems = lambda d: d.iteritems()
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import cPickle as pickle
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from cStringIO import StringIO as BytesIO, StringIO
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NativeStringIO = BytesIO
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exec('def reraise(tp, value, tb=None):\n raise tp, value, tb')
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from itertools import imap, izip, ifilter
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intern = intern
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def implements_iterator(cls):
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cls.next = cls.__next__
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del cls.__next__
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return cls
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def implements_to_string(cls):
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cls.__unicode__ = cls.__str__
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cls.__str__ = lambda x: x.__unicode__().encode('utf-8')
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return cls
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get_next = lambda x: x.next
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def encode_filename(filename):
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if isinstance(filename, unicode):
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return filename.encode('utf-8')
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return filename
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try:
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next = next
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except NameError:
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def next(it):
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return it.next()
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def with_metaclass(meta, *bases):
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# This requires a bit of explanation: the basic idea is to make a
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# dummy metaclass for one level of class instanciation that replaces
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# itself with the actual metaclass. Because of internal type checks
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# we also need to make sure that we downgrade the custom metaclass
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# for one level to something closer to type (that's why __call__ and
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# __init__ comes back from type etc.).
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#
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# This has the advantage over six.with_metaclass in that it does not
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# introduce dummy classes into the final MRO.
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class metaclass(meta):
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__call__ = type.__call__
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__init__ = type.__init__
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def __new__(cls, name, this_bases, d):
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if this_bases is None:
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return type.__new__(cls, name, (), d)
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return meta(name, bases, d)
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return metaclass('temporary_class', None, {})
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try:
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from collections import Mapping as mapping_types
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except ImportError:
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import UserDict
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mapping_types = (UserDict.UserDict, UserDict.DictMixin, dict)
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# common types. These do exist in the special types module too which however
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# does not exist in IronPython out of the box. Also that way we don't have
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# to deal with implementation specific stuff here
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class _C(object):
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def method(self): pass
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def _func():
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yield None
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function_type = type(_func)
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generator_type = type(_func())
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method_type = type(_C().method)
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code_type = type(_C.method.__code__)
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try:
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raise TypeError()
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except TypeError:
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_tb = sys.exc_info()[2]
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traceback_type = type(_tb)
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frame_type = type(_tb.tb_frame)
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try:
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from urllib.parse import quote_from_bytes as url_quote
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except ImportError:
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from urllib import quote as url_quote
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try:
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from thread import allocate_lock
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except ImportError:
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try:
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from threading import Lock as allocate_lock
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except ImportError:
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from dummy_thread import allocate_lock
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