re 模块为高级字符串处理提供正则表达式工具。对于复杂的匹配和操作,正则表达式提供简洁,优化的解决方案:
>>>
import re
re.findall(r'\bf[a-z]*', 'which foot or hand fell fastest')
['foot', 'fell', 'fastest']
re.sub(r'(\b[a-z]+) \1', r'\1', 'cat in the the hat')
'cat in the hat'
当只需要简单的功能时,首选字符串方法因为它们更容易阅读和调试:
>>>
'tea for too'.replace('too', 'two')
'tea for two'
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