# Copyright (c) 2020 PaddlePaddle 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.
import paddle
import paddle.nn as nn
__all__ = ["degree_norm"]
[docs]def degree_norm(graph, mode="indegree"):
assert mode in [
'indegree', 'outdegree'
], "The degree_norm mode should be in ['indegree', 'outdegree']. But recieve mode=%s" % mode
if mode == "indegree":
degree = graph.indegree()
elif mode == "outdegree":
degree = graph.outdegree()
norm = paddle.cast(degree, dtype=paddle.get_default_dtype())
norm = paddle.clip(norm, min=1.0)
norm = paddle.pow(norm, -0.5)
norm = paddle.reshape(norm, [-1, 1])
return norm