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  1. import re
  2. text = "hello23 the2e are 13 5.12apples *specially_x00123 named 31st"
  3. pattern = r"\*[^\W_\n]+_[a-z]\d+\b|(\d)"
  4. print (re.sub(pattern, lambda x: "#" if x.group(1) else x.group(), text))
  5.  
Success #stdin #stdout 0.02s 27712KB
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hello## the#e are ## #.##apples *specially_x00123 named ##st
https://ideone.com/K1vSDc
language:
Python 3 (python  3.9.5)
created:
4 years ago
visibility:
public

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