laywerrobot/lib/python3.6/site-packages/tensorflow/python/util/function_utils.py
2020-08-27 21:55:39 +02:00

57 lines
1.8 KiB
Python

# Copyright 2018 The TensorFlow Authors. All Rights Reserved.
#
# 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.
# ==============================================================================
"""Utility to retrieve function args."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
import functools
from tensorflow.python.util import tf_decorator
from tensorflow.python.util import tf_inspect
def _is_bounded_method(fn):
_, fn = tf_decorator.unwrap(fn)
return tf_inspect.ismethod(fn) and (fn.__self__ is not None)
def _is_callable_object(obj):
return hasattr(obj, '__call__') and tf_inspect.ismethod(obj.__call__)
def fn_args(fn):
"""Get argument names for function-like object.
Args:
fn: Function, or function-like object (e.g., result of `functools.partial`).
Returns:
`tuple` of string argument names.
Raises:
ValueError: if partial function has positionally bound arguments
"""
if isinstance(fn, functools.partial):
args = fn_args(fn.func)
args = [a for a in args[len(fn.args):] if a not in (fn.keywords or [])]
else:
if _is_callable_object(fn):
fn = fn.__call__
args = tf_inspect.getfullargspec(fn).args
if _is_bounded_method(fn):
args.remove('self')
return tuple(args)