47 lines
1.6 KiB
Python
47 lines
1.6 KiB
Python
# Copyright 2017 The TensorFlow Authors. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ==============================================================================
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"""Converts the ternary conditional operator."""
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import gast
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from tensorflow.python.autograph.core import converter
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from tensorflow.python.autograph.pyct import parser
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from tensorflow.python.autograph.pyct import templates
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class ConditionalExpressionTransformer(converter.Base):
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"""Converts conditional expressions to functional form."""
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def visit_IfExp(self, node):
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template = '''
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ag__.if_exp(
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test,
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lambda: true_expr,
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lambda: false_expr,
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expr_repr)
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'''
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expr_repr = parser.unparse(node.test, include_encoding_marker=False).strip()
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return templates.replace_as_expression(
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template,
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test=node.test,
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true_expr=node.body,
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false_expr=node.orelse,
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expr_repr=gast.Constant(expr_repr, kind=None))
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def transform(node, ctx):
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node = ConditionalExpressionTransformer(ctx).visit(node)
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return node
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