Python中关于正则捕获操作的示例

这篇文章主要介绍了Python正则捕获操作,结合具体实例形式分析了Python基于正则表达式的分组、捕获、替换等相关操作技巧,需要的朋友可以参考下

>>> bds = '10+6/5-4*2' # 表达式
>>> m = re.sub(r'([*+-/])', ' \1 ', bds) # 注意\1左右皆有一个空格！！
>>> m
 '10 + 6 / 5 - 4 * 2' 

>>> bds = '10+6/5-4*2' # 表达式
>>> m = re.sub(r'([*+-/])', ' \g<1> ', bds)
>>> m
 '10 + 6 / 5 - 4 * 2' 

>>> greed = "Hello Jack! Are you OK, Jack?"
>>> m = re.sub(r"Hello (\w+)! Are you OK, \1?", "\g<1>", greed)
>>> m
"Hello Jack! Are you OK, Jack?" 

>>> greed = "Hello Jack! Are you OK, Jack?"
>>> m = re.sub(r"Hello (?P<yourname>\w+)! Are you OK, (?P=yourname)?", "\g<yourname>", greed)
>>> m
"Hello Jack! Are you OK, Jack?" 

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