如何在python中用正则表达式替换一个空格? [英] How to replace just one whitespace with regex in python?

问题描述

例如:

T h e t e x t i s w h a t I w a n t t or e p l a c e

我想要这样的结果:

文字是我要替换的

我用 shell、sed 试过了，

 echo 'T hetextis W hat I wantreplace e'|sed -r "s/(([a-zA-Z])\s){1}/\2/g"|sed 's/\//G'

成功了.但我不知道如何在 python 中替换它.有人可以帮我吗?

解决方案

如果您只想转换每个字符之间有空格的字符串:

<预><代码>>>>进口重新>>>re.sub(r'(.) ', r'\1', 'T h e t e x t i s wh a t I w a n t to or r e p l c e')'文本是我想要替换的'

或者，如果您想删除所有单个空格并将空格替换为一个:

<预><代码>>>>re.sub(r'(?) +', r'\1', 'A B C D')'A B C D'

for example:

T h e   t e x t   i s   w h a t   I   w a n t   t o   r e p l a c e

I want the result like this:

The text is what I want to replace

I tried that with shell, sed,

 echo 'T h e   t e x t   i s   W h a t   I  w a n t   r e p l a c e'|sed -r "s/(([a-zA-Z])\s){1}/\2/g"|sed 's/\  / /g'

it's successfully. but I don't know how to replace this in python. could anybody help me?

解决方案

If you just want to convert a string that has whitespace between each chars:

>>> import re
>>> re.sub(r'(.) ', r'\1', 'T h e   t e x t   i s   w h a t   I   w a n t   t o  r e p l a c e')
'The text is what I want to replace'

Or, if you want to remove all single whitespace and replace whitespaces to just one:

>>> re.sub(r'( ?) +', r'\1', 'A B  C   D')
'AB C D'

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