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#  #

## 1 ##

 Python 

## 2__name__  ##

 Python  

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



 lname  `main`  `not main`  `main` 

![name1](http://upload-images.jianshu.io/upload_images/2136918-d892d81a71cda9d6?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)


 user_lname  lname  `not main`  lname 


![name2](http://upload-images.jianshu.io/upload_images/2136918-9137cb874588dded?imageMogr2/auto-orient/strip%7CimageView2/2/w/1240)
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