59 lines
1.7 KiB
Python
59 lines
1.7 KiB
Python
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# 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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"""Converting code to AST.
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Adapted from Tangent.
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"""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import print_function
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import textwrap
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import gast
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from tensorflow.python.util import tf_inspect
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def parse_entity(entity):
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"""Returns the AST of given entity."""
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source = tf_inspect.getsource(entity)
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source = textwrap.dedent(source)
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return parse_str(source), source
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def parse_str(src):
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"""Returns the AST of given piece of code."""
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return gast.parse(src)
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def parse_expression(src):
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"""Returns the AST of given identifier.
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Args:
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src: A piece of code that represents a single Python expression
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Returns:
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A gast.AST object.
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Raises:
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ValueError: if src does not consist of a single Expression.
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"""
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node = parse_str(src)
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assert isinstance(node, gast.Module)
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if len(node.body) != 1 and not isinstance(node.body[0], gast.Expr):
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raise ValueError(
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'Expected a single expression, found instead %s' % node.body)
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return node.body[0].value
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