Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/tensorflow/python/eager/polymorphic_function/tf_method_target.py: 55%

1# Copyright 2023 The TensorFlow Authors. All Rights Reserved. 

2# 

3# Licensed under the Apache License, Version 2.0 (the "License"); 

4# you may not use this file except in compliance with the License. 

5# You may obtain a copy of the License at 

6# 

7# http://www.apache.org/licenses/LICENSE-2.0 

8# 

9# Unless required by applicable law or agreed to in writing, software 

10# distributed under the License is distributed on an "AS IS" BASIS, 

11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 

12# See the License for the specific language governing permissions and 

13# limitations under the License. 

14# ============================================================================== 

15"""Module for the TFMethodTarget Class.""" 

16 

17import weakref 

18 

19from tensorflow.python.util import tf_inspect 

20 

21 

22# When a method is bound to objects of this type, it allows AutoGraph to 

23# recover a weak reference the original method's self pointer, so that it can 

24# execute it consistent with class_method_to_instance_method's 

25# bound_method_wrapper. 

26# TODO(b/119246461): This is not pretty. Use a descriptor instead? 

27class TfMethodTarget: 

28 """Binding target for methods replaced by function and defun.""" 

29 

30 __slots__ = ("weakrefself_target__", "weakrefself_func__") 

31 

32 def __init__(self, target, original_python_function): 

33 self.weakrefself_target__ = target 

34 self.weakrefself_func__ = weakref.ref(original_python_function) 

35 

36 @property 

37 def target(self): 

38 return self.weakrefself_target__() 

39 

40 @property 

41 def target_class(self): 

42 true_self = self.weakrefself_target__() 

43 if tf_inspect.isclass(true_self): 

44 # Class method 

45 return true_self 

46 else: 

47 return true_self.__class__ 

48 

49 def call(self, args, kwargs): 

50 wrapped_fn = self.weakrefself_func__() 

51 return wrapped_fn(self.weakrefself_target__(), *args, **kwargs)