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# encoding: utf-8
"""
This module provides compatibility between Python 2 and 3. Hardly
anything is used by this project to constitute including `six`_.
.. _`six`: http://pythonhosted.org/six
"""
import sys
if sys.version_info[0] < 3:
# Python 2.
unicode = unicode
string_types = (basestring,)
from collections import Iterable
from itertools import izip_longest
def iterkeys(mapping):
return mapping.iterkeys()
else:
# Python 3.
unicode = str
string_types = (unicode,)
from collections.abc import Iterable
from itertools import zip_longest as izip_longest
def iterkeys(mapping):
return mapping.keys()
try:
# Python 3.6+.
from collections.abc import Collection
except ImportError:
# Python 2.7 - 3.5.
from collections import Container as Collection
CollectionType = Collection
IterableType = Iterable
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