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57 lines
1.4 KiB
Python
57 lines
1.4 KiB
Python
# Copyright 2019 Ram Rachum and collaborators.
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# This program is distributed under the MIT license.
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'''Python 2/3 compatibility'''
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import abc
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import os
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import inspect
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import sys
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PY3 = (sys.version_info[0] == 3)
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PY2 = not PY3
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if hasattr(abc, 'ABC'):
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ABC = abc.ABC
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else:
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class ABC(object):
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"""Helper class that provides a standard way to create an ABC using
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inheritance.
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"""
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__metaclass__ = abc.ABCMeta
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__slots__ = ()
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if hasattr(os, 'PathLike'):
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PathLike = os.PathLike
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else:
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class PathLike(ABC):
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"""Abstract base class for implementing the file system path protocol."""
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@abc.abstractmethod
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def __fspath__(self):
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"""Return the file system path representation of the object."""
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raise NotImplementedError
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@classmethod
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def __subclasshook__(cls, subclass):
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return (
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hasattr(subclass, '__fspath__') or
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# Make a concession for older `pathlib` versions:g
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(hasattr(subclass, 'open') and
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'path' in subclass.__name__.lower())
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)
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try:
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iscoroutinefunction = inspect.iscoroutinefunction
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except AttributeError:
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iscoroutinefunction = lambda whatever: False # Lolz
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if PY3:
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string_types = (str,)
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text_type = str
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else:
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string_types = (basestring,)
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text_type = unicode
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