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  1. import re
  2.  
  3. def parse(text):
  4.     if not text:
  5.         return None
  6.     match = re.search(r"([0-9]+(?:\.[0-9]+)?)\s*mm\b", text.lower())
  7.     if match:
  8.     	return float(match.group(1))
  9.     return text
  10.  
  11. tests = ['12.3 mm', '12.3mm', '32.0 mm / 1.259"', '32.0mm / 1.259"']
  12. for s in tests: 
  13.     print( parse(s) )
Success #stdin #stdout 0.02s 9512KB
comments (?)
stdin 
Standard input is empty
stdout 
12.3
12.3
32.0
32.0
https://ideone.com/Qs5lpu
language:
Python 3 (python  3.12)
created:
6 years ago
visibility:
secret

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