3RNN/Lib/site-packages/tensorflow/python/autograph/converters/asserts.py
2024-05-26 19:49:15 +02:00

49 lines
1.7 KiB
Python

# Copyright 2016 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.
# ==============================================================================
"""Converts assert statements to their corresponding TF calls."""
import gast
from tensorflow.python.autograph.core import converter
from tensorflow.python.autograph.pyct import templates
class AssertTransformer(converter.Base):
"""Transforms Assert nodes to Call so they can be handled as functions."""
def visit_Assert(self, node):
self.generic_visit(node)
# Note: The lone tf.Assert call will be wrapped with control_dependencies
# by side_effect_guards.
template = """
ag__.assert_stmt(test, lambda: msg)
"""
if node.msg is None:
return templates.replace(
template,
test=node.test,
msg=gast.Constant('Assertion error', kind=None))
elif isinstance(node.msg, gast.Constant):
return templates.replace(template, test=node.test, msg=node.msg)
else:
raise NotImplementedError('can only convert string messages for now.')
def transform(node, ctx):
node = AssertTransformer(ctx).visit(node)
return node