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python search-replace on a match with n non-nested groups

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  1. import re
  2.  
  3.  
  4. def replace(match, withwhat):
  5.  
  6.     starttext = match.group(0)
  7.     n = len(withwhat)
  8.     off = match.start(0)
  9.  
  10.     tmp = starttext
  11.     for i in range(n):
  12.             delta = len(tmp)-len(starttext)
  13.             tmp = tmp[:match.start(i+1)-off+delta ] + withwhat[i](match.group(i+1)) + tmp[match.end(i+1)-off+delta:]
  14.     return tmp
  15.  
  16. #test
  17. funcs = [lambda x: '1'+x+'1',lambda x: '2'+x+'2']
  18. #regex contains 2 capturing groups
  19. print re.sub(regex, lambda x: replace(x, funcs), text)

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