fork(1) download 
  1. import re
  2. string = "one,two,three,"
  3. res = ",".join(["Aa" if x else "" for x in string.split(",")]) # non-regex way
  4. print(res)
  5. print(re.sub(r'.*?(?=,)',r'aA', string))  #regex: fixed version
  6. print(re.sub(r'.*?(,+)',r'aA\1', string)) #regex: capturing and backreferences
  7. print(re.sub(r'[a-z]+',r'aA', string, flags=re.I)) # a very simple, shortest possible working regex
Success #stdin #stdout 0s 9024KB
comments (?)
stdin 
Standard input is empty
stdout 
Aa,Aa,Aa,
aA,aA,aA,
aA,aA,aA,
aA,aA,aA,
https://ideone.com/6Xw0BU
language:
Python (cpython 2.7.16)
created:
7 years ago
visibility:
secret

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