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  1. import re
  2.  
  3. strings = [
  4.     "t1E2S3T",
  5.     "t1E2S33"
  6. ]
  7.  
  8. def emne_validator(emne):
  9.     pattern = r"(?=(?:[^a-zA-Z\n]*[a-zA-Z]){4}[^a-zA-Z\n]*\Z)(?=(?:[^\d\n]*\d){3}[^\d\n]*\Z)"
  10.     m = re.match(pattern, emne)
  11.     return m is not None
  12.  
  13. for txt in strings:
  14.     result = emne_validator(txt)
  15.     if result:
  16.         print(f"Valid input for: {txt}")
  17.     else:
  18.         print(f"Invalid input for: {txt}")
Success #stdin #stdout 0.03s 9504KB
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stdin
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Standard input is empty
stdout
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Valid input for: t1E2S3T
Invalid input for: t1E2S33
https://ideone.com/yw50dn
language:
Python 3 (python  3.12)
created:
4 years ago
visibility:
secret

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