環境：Python3.6.6 + tensorflow-gpu

原始碼如下：

import tensorflow as tf

def main():
    print("hello tf.app.run")

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

執行完後，提示

Exception has occurred: SystemExit
exception: no description
File "/home/work/Downloads/SSD-Tensorflow/test.py", line 10, in <module> tf.app.run()

改為直接呼叫main()函式，就好了。

import tensorflow as tf

def main():
    print("hello tf.app.run")

if __name__ == '__main__':
    main()

即便不改，程式結果也是正確的。

參考了：https://blog.csdn.net/forestlinzi0059/article/details/79016700