We use cookies to ensure you have the best browsing experience on our website. Please read our cookie policy for more information about how we use cookies.
  1. Prepare
  2. Python
  3. Regex and Parsing
  4. Validating Credit Card Numbers
  5. Discussions

Validating Credit Card Numbers

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

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