python判断字符串是否为空

（转载）http://qianchenglong.github.io/2014/12/05/python%E5%88%A4%E6%96%AD%E5%AD%97%E7%AC%A6%E4%B8%B2%E6%98%AF%E5%90%A6%E4%B8%BA%E7%A9%BA/

代码

• 变量为字符串类型(优雅的方式)

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if not string: print('not empty') else: print('empty')

• 变量类型不确定

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if string == '': print('not empty') else: print('empty')

参考

1. https://docs.python.org/2/library/stdtypes.html#truth-value-testing
2. http://stackoverflow.com/questions/9573244/most-elegant-way-to-check-if-the-string-is-empty-in-python