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if __name__ == '__main__作用'
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python/python_main.md

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1、可以在这个if下测试函数或类。
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2、防止模块被导入时,函数或类的代码被执行2次。
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![](main-1.png)
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![](main-2.png)
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![](main-3.png)
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![](main-4.png)
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[点击黄哥python培训试看视频播放地址](https://github.com/pythonpeixun/article/blob/master/python_shiping.md)
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[黄哥python远程视频培训班] (https://github.com/pythonpeixun/article/blob/master/index.md)

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