Python正则表达式:在引号之间查找和替换逗号

Question

我有一个字符串,

line = '12/08/2013,3,"9,25",42:51,"3,08","12,9","13,9",159,170,"3,19",437,'

我想在引号之间用":"找到并替换逗号.寻找结果

line = '12/08/2013,3,9:25,42:51,3:08,12:9,13:9,159,170,3:19,437,'

到目前为止,我已经能够匹配这种模式,

import re
re.findall('(\"\d),(.+?\")', line)

但是,我想我应该使用

re.compile(...something..., line)
re.sub(':', line)

有谁知道如何做到这一点？谢谢,labjunky

Answer 1

>>> import re
>>> line = '12/08/2013,3,"9,25",42:51,"3,08","12,9","13,9",159,170,"3,19",437,'
>>> re.sub(r'"(\d+),(\d+)"', r'\1:\2', line)
'12/08/2013,3,9:25,42:51,3:08,12:9,13:9,159,170,3:19,437,'

\1,\2请参阅匹配的组.

非正则表达式解决方案:

>>> ''.join(x if i % 2 == 0 else x.replace(',', ':')
            for i, x in enumerate(line.split('"')))
'12/08/2013,3,9:25,42:51,3:08,12:9,13:9,159,170,3:19,437,'