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  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Validating Credit Card Numbers
  5. Discussions

Validating Credit Card Numbers

  • ntautchkaenr
     + 0 comments
    import re

pattern = r'^(?!.*(\d)(-*\1){3,})([456][0-9]{3}-?([0-9]{4}-?){3})$'

for each in range(int(input())):
    if(re.match(pattern, input())):
        print('Valid')
    else:
        print('Invalid')