fork download 
  1. import re
  2. s = "3[a2[c]]"
  3. s_final = s
  4. rx = r'(\d+)\[([^][]*)]'
  5. n = 1 
  6. while n:
  7.     s_final, n = re.subn(rx, lambda x: x.group(2) * int(x.group(1)), s_final)
  8.  
  9. print(s_final)
  10.  
  11.  
Success #stdin #stdout 0.02s 9740KB
comments (?)
stdin 
Standard input is empty
stdout 
accaccacc
https://ideone.com/sVDPwK
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
secret

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!