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#  #

## 1 ##

 Python 

## 2__name__  ##

 Python  

 `__name__`   `name`  `__main__` ,**  `__main__` **



 lname  `main`  `not main`  `main` 

![](http://twowaterimage.oss-cn-beijing.aliyuncs.com/2019-10-14-name%E5%B1%9E%E6%80%A7%E5%8C%BA%E5%88%86%E6%A8%A1%E5%9D%971.png)


 user_lname  lname  `not main`  lname 


![](http://twowaterimage.oss-cn-beijing.aliyuncs.com/2019-10-14-name%E5%B1%9E%E6%80%A7%E5%8C%BA%E5%88%86%E6%A8%A1%E5%9D%972.png)
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