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  1. import re
  2. print(re.sub(r''''[^']*'|"[^"]*"''', lambda x: x.group(0).replace(',', ':'), '''0,1,"2,3",'4,5','''))
Success #stdin #stdout 0.02s 9500KB
stdin
Standard input is empty
stdout
0,1,"2:3",'4:5',