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tf.app.run()

2017-08-01 19:48 309 查看
在很多TensorFlow公布的Demo中,都有这样的代码存在,如下,这是干什么的呢?

if __name__ == "__main__":
tf.app.run()


我们来看一下源代码:

# tensorflow/tensorflow/python/platform/default/_app.py

# Copyright 2015 Google Inc. 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.
# ==============================================================================

"""Generic entry point script."""
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function

import sys

from tensorflow.python.platform import flags

def run(main=None):
f = flags.FLAGS
f._parse_flags()
main = main or sys.modules['__main__'].main
sys.exit(main(sys.argv))


  

处理flag解析,然后执行main函数,那么flag解析是什么意思呢?诸如这样的:

tf.app.flags.DEFINE_boolean("self_test", False, "True if running a self test.")
tf.app.flags.DEFINE_boolean('use_fp16', False,
"Use half floats instead of full floats if True.")
FLAGS = tf.app.flags.FLAGS


  

参考资料

http://stackoverflow.com/questions/33703624/how-does-tf-app-run-work
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