• tf.app.run()


    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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  • 原文地址:https://www.cnblogs.com/antflow/p/7270341.html
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