96 lines
2.2 KiB
Python
96 lines
2.2 KiB
Python
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# 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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import datetime as datetime_module
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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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try:
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isasyncgenfunction = inspect.isasyncgenfunction
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except AttributeError:
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isasyncgenfunction = 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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try:
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from collections import abc as collections_abc
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except ImportError: # Python 2.7
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import collections as collections_abc
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if sys.version_info[:2] >= (3, 6):
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time_isoformat = datetime_module.time.isoformat
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else:
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def time_isoformat(time, timespec='microseconds'):
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assert isinstance(time, datetime_module.time)
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if timespec != 'microseconds':
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raise NotImplementedError
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result = '{:02d}:{:02d}:{:02d}.{:06d}'.format(
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time.hour, time.minute, time.second, time.microsecond
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)
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assert len(result) == 15
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return result
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def timedelta_format(timedelta):
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time = (datetime_module.datetime.min + timedelta).time()
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return time_isoformat(time, timespec='microseconds')
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def timedelta_parse(s):
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hours, minutes, seconds, microseconds = map(
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int,
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s.replace('.', ':').split(':')
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)
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return datetime_module.timedelta(hours=hours, minutes=minutes,
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seconds=seconds,
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microseconds=microseconds)
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