wehub-resource-sync
50 lines
1.5 KiB
Python
50 lines
1.5 KiB
Python
# Copyright (c) 2019 PaddlePaddle 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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from paddle import base
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from paddle.base.framework import Variable
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def cyclic_reader(reader):
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def __reader__():
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while True:
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yield from reader()
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return __reader__
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class FeedDataReader:
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def __init__(self, feed_list, reader):
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self._feed_list = []
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for var in feed_list:
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if isinstance(var, Variable):
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self._feed_list.append(var.name)
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else:
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self._feed_list.append(var)
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self._reader = cyclic_reader(reader)
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self._iter = self._reader()
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def _feed_executor(self):
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next_data = next(self._iter)
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feed_data = {}
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assert len(self._feed_list) == len(next_data)
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for key, value in zip(self._feed_list, next_data):
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feed_data[key] = value
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return feed_data
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def get_next(self, exe, program):
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assert isinstance(exe, base.Executor), "exe must be Executor"
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return self._feed_executor()
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