Python Regex Question -

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i have end tag followed carriage return line feed (x0dx0a) followd 1 or more tabs (x09) followed new start tag .

something this: 

</tag1>x0dx0ax09x09x09<tag2> or </tag1>x0dx0ax09x09x09x09x09<tag2>

what python regex should use replace this:

</tag1><tag3>content</tag3><tag2>

thanks in advance.

here code need:

>>> import re >>> sample = '</tag1>\r\n\t\t\t\t<tag2>' >>> sample '</tag1>\r\n\t\t\t\t<tag2>' >>> pattern = '(</tag1>)\r\n\t+(<tag2>)' >>> replacement = r'\1<tag3>content</tag3>\2' >>> re.sub(pattern, replacement, sample) '</tag1><tag3>content</tag3><tag2>' >>>

note \r\n\t+ may bit specific, if production of input not under control. may better adopt more general \s* (zero or more whitespace characters).

using regexes parse xml , html not idea in general ... while it's hard see failure mode here (apart elementary errors in getting pattern correct), might tell underlying problem is, in case other solution better.


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