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- # Copyright 2021 Huawei Technologies Co., Ltd
- #
- # 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.
- # ===========================================================================
- """generate json desc for squeeze"""
- from ._utils import Expander, ExpanderInfoValidator as VLD
-
-
- @VLD.check_attrs('axis')
- class Squeeze(Expander):
- """Squeeze expander"""
-
- def _expand(self, graph_builder):
- input_x = self.inputs[0]
- out_shape = self.infer_shape(input_x.shape, self.attrs['axis'])
- result = graph_builder.emit('Reshape', [input_x], attrs={'shape': out_shape})
-
- return result
-
- @staticmethod
- def infer_shape(shape, axis):
- """infer shape for squeeze"""
- def squeeze_axis(shape, axis):
- if not axis:
- out_shape = [d for d in shape if d != 1]
- else:
- ndim = len(shape)
- out_shape = [shape[i] for i in range(ndim) if not (i in axis or (i - ndim) in axis)]
- if not out_shape:
- out_shape = [1]
- return out_shape
- if isinstance(shape, (list, tuple)):
- if isinstance(axis, int):
- axis = [axis]
- if isinstance(axis, (list, tuple)):
- return squeeze_axis(shape, axis)
- raise ValueError("Invalid axis for Squeeze.")
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