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  1. import re
  2.  
  3. def minuscula(m):
  4.     return m.group(1).lower() if m.group(1) else ''
  5.  
  6. strs = "abc Abc aBC cde123 def-ghi $?!123"
  7. r = re.compile(r"([a-zA-Z \\])|[^a-zA-Z \\]")
  8. print(r.sub(minuscula, strs))
  9.  
Success #stdin #stdout 0.02s 27728KB
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stdin
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Standard input is empty
stdout
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abc abc abc cde defghi
https://ideone.com/3bjnUL
language:
Python 3 (python  3.9.5)
created:
5 years ago
visibility:
public

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