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@ -3,11 +3,107 @@
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flask._compat |
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~~~~~~~~~~~~~ |
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Some py2/py3 compatibility support that is not yet available in |
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"six" 1.3.0. |
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There are bugs open for "six" for all this stuff, so we can remove it |
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again from here as soon as we require a new enough "six" release. |
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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: (c) 2013 by Armin Ronacher. |
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:license: BSD, see LICENSE for more 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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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 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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