Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/tensorflow/python/eager/core.py: 80%

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"""Experimental API for TensorFlow's "Eager" mode of execution.""" 

16 

17from tensorflow.python import pywrap_tfe 

18from tensorflow.python.framework import errors 

19from tensorflow.python.platform import tf_logging as logging 

20 

21# Trace of execution and memory usage. 

22_active_trace = None 

23 

24 

25def _status_to_exception(status): 

26 try: 

27 error_class = errors.exception_type_from_error_code(status.code) 

28 e = error_class(None, None, status.message, status.payloads) 

29 logging.error_log("%s: %s" % (e.__class__.__name__, e)) 

30 return e 

31 except KeyError: 

32 e = errors.UnknownError( 

33 None, None, status.message, status.code, status.payloads 

34 ) 

35 logging.error_log("%s: %s" % (e.__class__.__name__, e)) 

36 return e 

37 

38 

39class _NotOkStatusException(Exception): 

40 """Exception class to handle not ok Status.""" 

41 

42 def __init__(self, message, code, payloads): 

43 super(_NotOkStatusException, self).__init__() 

44 self.message = message 

45 self.code = code 

46 self.payloads = payloads 

47 

48 def __str__(self): 

49 e = _status_to_exception(self) 

50 return "%s: %s" % (e.__class__.__name__, e) 

51 

52 

53pywrap_tfe.TFE_Py_RegisterExceptionClass(_NotOkStatusException) 

54 

55 

56class _FallbackException(Exception): 

57 """Exception class to handle fallback from the fastpath. 

58 

59 The fastpath that we refer to here is the one implemented to reduce per-op 

60 overheads (TFE_Py_FastPathExecute_C). If the conditions for executing the op 

61 on the fastpath are not met, we fallback to a safer (and more complete) 

62 slowpath, and this Exception is raised to signal that transition. 

63 """ 

64 pass 

65 

66 

67class _SymbolicException(Exception): 

68 """Exception class to handle use of symbolic tensors when executing eagerly. 

69 

70 `keras.Input()` creates symbolic tensors (in a FuncGraph managed by the 

71 Keras backend) while in eager execution. This exception is used to 

72 identify this case (raised in `convert_to_tensor` cause generated functions 

73 for ops to construct graphs instead of executing the kernel). 

74 """ 

75 pass 

76 

77 

78pywrap_tfe.TFE_Py_RegisterFallbackExceptionClass(_FallbackException)