#!/usr/bin/python
# Filename: using_name.py
if __name__ == '__main__':
print 'This program is being run by itself'
else:
print 'I am being imported from another module'
(源文件:code/using_name.py)
輸出
$ python using_name.py
This program is being run by itself
$ python
>>> import using_name
I am being imported from another module
>>>
```
它如何工作
每個 Python 模塊都有它的name,如果它是'main',這說明這個模塊被用戶單獨運行,我們可以進行相應的恰當操作。