【python】if __name__==“__main__”判断语句的讲解

概述：举例两个简单的模块。

第一个模块one.py

print("words outside in func in one.py")

if __name__ == "__main__":
    print("one.py is being run directly")
else:

    print("one.py is being imported into another module")

第二个模块two.py

#coding=utf-8
import one  #当导入时该模块即被执行


print("words in two.py")
if __name__ == '__main__':
    print("two.py is being run directly")
else:

    print("two.py is being imported into another module")

这时运行第一个模块one.py，输出：

words outside in func in one.py

one.py is being run directly

运行第二个模块two.py，输出：

words outside in func in one.py
one.py is being imported into another module
words in two.py

two.py is being run directly

概述：当本模块直接运行时，则name为__main__，则if判断为正确，执行语句。当one.py模块是被第三方模块调用执行时，则name为one，不等于__main__，所以执行else中语句