python中if __name__ == "__main__"：用法解析

#hello.pypython def sayHello():     str="hello"     print(str); if__name__=="__main__":     print ('This is main of module "hello.py"')     sayHello() python做爲一種腳本語言，咱們用python寫的各個module均可以包含以上那麼一個累死c中

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