76 lines
2.7 KiB
Python
76 lines
2.7 KiB
Python
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# Copyright (c) 2010-2017 Benjamin Peterson
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#
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to deal
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# in the Software without restriction, including without limitation the rights
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# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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# copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be included in all
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# copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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import builtins
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import collections.abc
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import io
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import math
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import sys
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import types
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import queue # noqa: F401
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inf = math.inf
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nan = math.nan
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string_classes = (str, bytes)
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int_classes = int
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FileNotFoundError = builtins.FileNotFoundError
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StringIO = io.StringIO
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container_abcs = collections.abc
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PY37 = sys.version_info[0] == 3 and sys.version_info[1] >= 7
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def with_metaclass(meta: type, *bases) -> type:
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"""Create a base class with a metaclass."""
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# This requires a bit of explanation: the basic idea is to make a dummy
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# metaclass for one level of class instantiation that replaces itself with
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# the actual metaclass.
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class metaclass(meta): # type: ignore[misc, valid-type]
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def __new__(cls, name, this_bases, d):
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return meta(name, bases, d)
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@classmethod
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def __prepare__(cls, name, this_bases):
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return meta.__prepare__(name, bases)
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return type.__new__(metaclass, 'temporary_class', (), {})
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# Gets a function from the name of a method on a type
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def get_function_from_type(cls, name):
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return getattr(cls, name, None)
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# The codes below is not copied from the six package, so the copyright
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# declaration at the beginning does not apply.
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#
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# Copyright(c) PyTorch contributors
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#
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def istuple(obj) -> bool:
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# Usually instances of PyStructSequence is also an instance of tuple
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# but in some py2 environment it is not, so we have to manually check
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# the name of the type to determine if it is a namedtupled returned
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# by a pytorch operator.
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t = type(obj)
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return isinstance(obj, tuple) or t.__module__ == 'torch.return_types'
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def bind_method(fn, obj, obj_type):
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return types.MethodType(fn, obj)
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