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沈洁元 · 更新于 2018-11-28 11:00:43

使用模块的name


    #!/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

输出

$ 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

每个 Python 模块都有它的name,如果它是'main',这说明这个模块被用户单独运行,我们可以进行相应的恰当操作。