Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/tensorflow/python/autograph/converters/asserts.py: 44%

1# Copyright 2016 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"""Converts assert statements to their corresponding TF calls.""" 

16 

17import gast 

18 

19from tensorflow.python.autograph.core import converter 

20from tensorflow.python.autograph.pyct import templates 

21 

22 

23class AssertTransformer(converter.Base): 

24 """Transforms Assert nodes to Call so they can be handled as functions.""" 

25 

26 def visit_Assert(self, node): 

27 self.generic_visit(node) 

28 

29 # Note: The lone tf.Assert call will be wrapped with control_dependencies 

30 # by side_effect_guards. 

31 template = """ 

32 ag__.assert_stmt(test, lambda: msg) 

33 """ 

34 

35 if node.msg is None: 

36 return templates.replace( 

37 template, 

38 test=node.test, 

39 msg=gast.Constant('Assertion error', kind=None)) 

40 elif isinstance(node.msg, gast.Constant): 

41 return templates.replace(template, test=node.test, msg=node.msg) 

42 else: 

43 raise NotImplementedError('can only convert string messages for now.') 

44 

45 

46def transform(node, ctx): 

47 node = AssertTransformer(ctx).visit(node) 

48 return node