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type_utils.py
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type_utils.py
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# Copyright (c) 2021-2023, NVIDIA CORPORATION.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import inspect
import typing
from collections import defaultdict
T_co = typing.TypeVar("T_co", covariant=True)
T = typing.TypeVar('T')
T1 = typing.TypeVar('T1')
T2 = typing.TypeVar('T2')
T3 = typing.TypeVar('T3')
T4 = typing.TypeVar('T4')
# Use _DecoratorType as a type variable for decorators. See:
# https://github.com/python/mypy/pull/8336/files#diff-eb668b35b7c0c4f88822160f3ca4c111f444c88a38a3b9df9bb8427131538f9cR260
_DecoratorType = typing.TypeVar("_DecoratorType", bound=typing.Callable[..., typing.Any])
def greatest_ancestor(*cls_list):
"""
Returns the greatest common ancestor of the classes in the class list
"""
mros = [list(inspect.getmro(cls)) for cls in cls_list]
track = defaultdict(int)
while mros:
for mro in mros:
cur = mro.pop(0)
track[cur] += 1
if track[cur] == len(cls_list):
return cur
if len(mro) == 0:
mros.remove(mro)
return None # or raise, if that's more appropriate
@typing.overload
def unpack_union(cls_1: typing.Type[T]) -> typing.Union[typing.Type[T]]:
...
@typing.overload
def unpack_union(cls_1: typing.Type[T1], cls_2: typing.Type[T2]) -> typing.Union[typing.Type[T1], typing.Type[T2]]:
...
@typing.overload
def unpack_union(cls_1: typing.Type[T1], cls_2: typing.Type[T2],
cls_3: typing.Type[T3]) -> typing.Union[typing.Type[T1], typing.Type[T2], typing.Type[T3]]:
...
def unpack_union(*cls_list: typing.Type) -> typing.Union:
assert len(cls_list) > 0, "Union class list must have at least 1 element."
if (len(cls_list) == 1):
return typing.Union[cls_list[0]]
# elif (len(cls_list) == 2):
# return typing.Union[cls_list[0], cls_list[1]]
else:
out_union = unpack_union(cls_list[0:2])
# Since typing.Union[typing.Union[A, B], C] == typing.Union[A, B, C], we build the union up manually
for t in cls_list[2:]:
out_union = typing.Union[out_union, t]
return out_union
@typing.overload
def unpack_tuple(cls_1: typing.Type[T]) -> typing.Tuple[typing.Type[T]]:
...
@typing.overload
def unpack_tuple(cls_1: typing.Type[T1], cls_2: typing.Type[T2]) -> typing.Tuple[typing.Type[T1], typing.Type[T2]]:
...
@typing.overload
def unpack_tuple(cls_1: typing.Type[T1], cls_2: typing.Type[T2],
cls_3: typing.Type[T3]) -> typing.Tuple[typing.Type[T1], typing.Type[T2], typing.Type[T3]]:
...
def unpack_tuple(*cls_list: typing.Type) -> typing.Tuple:
assert len(cls_list) > 0, "Union class list must have at least 1 element."
if (len(cls_list) == 1):
return typing.Tuple[cls_list[0]]
# elif (len(cls_list) == 2):
# return typing.Union[cls_list[0], cls_list[1]]
else:
out_tuple = unpack_tuple(cls_list[0:2])
# Since typing.Tuple[typing.Tuple[A, B], C] == typing.Tuple[A, B, C], we build the union up manually
for t in cls_list[2:]:
out_tuple = typing.Tuple[out_tuple, t]
return out_tuple
def pretty_print_type_name(t: typing.Type) -> str:
"""
Determines a good label to use for a type. Keeps the strings shorter.
"""
if (t.__module__ == "typing"):
return str(t).replace("typing.", "")
return t.__module__.split(".")[0] + "." + t.__name__
def get_full_qualname(klass: typing.Type) -> str:
"""
Returns the fully qualified name of a class.
"""
module = klass.__module__
if module == '__builtin__':
return klass.__qualname__
return module + '.' + klass.__qualname__