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

Validating Credit Card Numbers

  • keyurusdadiya100
     + 0 comments

    Try this 

    # Enter your code here. Read input from STDIN. Print output to STDOUT
import re

N=int(input())

for _ in range(N):
    card=input()
    valid=re.search(r'^[456][0-9]{3}-?[0-9]{4}-?[0-9]{4}-?[0-9]{4}',card)
    
    if valid:
            valid=re.sub(r'-','',card)
            if len(valid)==16:
                valid=re.search(r'(\d)\1{3}',valid)
                if valid : 
                   print('Invalid')
                else : 
                    print('Valid')
            else : 
                print('Invalid')
            
    else : 
            print('Invalid')