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  1. import re
  2. text = "UURRUULLLRRDDDBBBUUU"
  3. print( re.sub(r"(.)\1*", lambda x: "{}{}".format(len(x.group()), x.group(1)), text) )
Success #stdin #stdout 0.03s 9636KB
comments (?)
stdin 
Standard input is empty
stdout 
2U2R2U3L2R3D3B3U
https://ideone.com/aRbM7I
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
secret

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