Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/tensorflow/python/ops/handle_data_util.py: 34%

1# Copyright 2017 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"""Decorator to overrides the gradient for a function.""" 

16 

17from tensorflow.python.client import pywrap_tf_session 

18from tensorflow.python.framework import cpp_shape_inference_pb2 

19from tensorflow.python.framework import dtypes 

20from tensorflow.python.types import core 

21from tensorflow.python.util import compat 

22 

23 

24def get_resource_handle_data(graph_op): 

25 assert (isinstance(graph_op, core.Symbol) 

26 and not isinstance(graph_op, core.Value)) 

27 

28 with graph_op.graph._c_graph.get() as c_graph: # pylint: disable=protected-access 

29 handle_data = pywrap_tf_session.GetHandleShapeAndType( 

30 c_graph, graph_op._as_tf_output()) # pylint: disable=protected-access 

31 

32 return cpp_shape_inference_pb2.CppShapeInferenceResult.HandleData.FromString( 

33 compat.as_bytes(handle_data)) 

34 

35 

36def get_handle_data(source_t): 

37 """Obtains HandleData from a tensor.""" 

38 if isinstance(source_t, core.Value): 

39 return source_t._handle_data # pylint: disable=protected-access 

40 return get_resource_handle_data(source_t) 

41 

42 

43def copy_handle_data(source_t, target_t): 

44 """Copies HandleData for variant and resource type tensors if available. 

45 

46 The CppShapeInferenceResult::HandleData proto contains information about the 

47 shapes and types of the element tensors of resource/variant type tensors. 

48 We need to copy this across function boundaries, i.e., when capturing a 

49 placeholder or when returning a function tensor as output. If we don't do this 

50 the element tensors will have unknown shapes, e.g., if a TensorList variant 

51 tensor is captured as a placeholder, elements popped from that list would have 

52 unknown shape. 

53 

54 Args: 

55 source_t: The tensor to copy HandleData from. 

56 target_t: The tensor to copy HandleData to. 

57 """ 

58 if (target_t.dtype == dtypes.resource or 

59 target_t.dtype == dtypes.variant): 

60 handle_data = get_handle_data(source_t) 

61 set_handle_data(target_t, handle_data) 

62 

63 

64def set_handle_data(target_t, handle_data): 

65 """Sets handle data on the giver tensor.""" 

66 if ( 

67 handle_data is None 

68 or not handle_data.is_set 

69 or not handle_data.shape_and_type 

70 ): 

71 return 

72 

73 # pylint: disable=protected-access 

74 if isinstance(target_t, core.Value): 

75 target_t._handle_data = handle_data 

76 return 

77 with target_t.graph._c_graph.get() as c_graph: 

78 pywrap_tf_session.SetHandleShapeAndType(c_graph, target_t._as_tf_output(), 

79 handle_data.SerializeToString()) 

80 # pylint: enable=protected-access 

81 

82 

83def create_handle_data(shape, dtype): 

84 handle_data = cpp_shape_inference_pb2.CppShapeInferenceResult.HandleData() 

85 handle_data.is_set = True 

86 handle_data.shape_and_type.append( 

87 cpp_shape_inference_pb2.CppShapeInferenceResult.HandleShapeAndType( 

88 shape=shape.as_proto(), dtype=dtype.as_datatype_enum)) 

89 return handle_data