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# Copyright 2017 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.
# ==============================================================================
"""Experimental API for TensorFlow's "Eager" mode of execution."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from tensorflow.python import pywrap_tensorflow
from tensorflow.python.framework import errors
# Trace of execution and memory usage.
_active_trace = None
def _status_to_exception(code, message):
try:
error_class = errors.exception_type_from_error_code(code)
return error_class(None, None, message)
except KeyError:
return errors.UnknownError(None, None, message, code)
class _NotOkStatusException(Exception):
"""Exception class to handle not ok Status."""
def __init__(self, message, code):
super(_NotOkStatusException, self).__init__()
self.message = message
self.code = code
def __str__(self):
e = _status_to_exception(self.code, self.message)
return "%s: %s" % (e.__class__.__name__, e)
pywrap_tensorflow.TFE_Py_RegisterExceptionClass(_NotOkStatusException)
class _FallbackException(Exception):
"""Exception class to handle fallback from the fastpath.
The fastpath that we refer to here is the one implemented to reduce per-op
overheads (TFE_Py_FastPathExecute_C). If the conditions for executing the op
on the fastpath are not met, we fallback to a safer (and more complete)
slowpath, and this Exception is raised to signal that transition.
"""
pass
pywrap_tensorflow.TFE_Py_RegisterFallbackExceptionClass(_FallbackException)
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