import random
import string
def luhn_algorithm(card_number):
card_number = [int(digit) for digit in card_number[::-1]]
total = 0
for i in range(len(card_number)):
if i % 2 == 1:
card_number *= 2
if card_number > 9:
card_number -= 9
total += card_number
return total % 10 == 0
def get_card_type(card_number):
# Determine the card type based on prefixes
card_types = {
"Visa": ["4"],
"MasterCard": ["51", "52", "53", "54", "55"],
"American Express": ["34", "37"],
"Discover": ["6011"]
# Add other card types if needed
}
for card_type, prefixes in card_types.items():
for prefix in prefixes:
if card_number.startswith(prefix):
return card_type
return "Unknown"
def generate_random_credit_card():
# Generate a random credit card number with the appropriate prefix
card_type = random.choice(list(card_types.keys()))
prefix = random.choice(card_types[card_type])
suffix = ''.join(random.choice(string.digits) for _ in range(9))
card_number = f"{prefix}{suffix}"
# Apply the Luhn algorithm to generate the last digit
check_digit = calculate_check_digit(card_number)
card_number += str(check_digit)
return card_number
def calculate_check_digit(card_number):
# Calculate the last digit using the Luhn algorithm
card_number = [int(digit) for digit in card_number[::-1]]
total = 0
for i in range(len(card_number)):
if i % 2 == 0:
card_number *= 2
if card_number > 9:
card_number -= 9
total += card_number
return (10 - (total % 10)) % 10
def validate_credit_card(card_number):
# Remove spaces and dashes from the card number
card_number = card_number.replace(" ", "").replace("-", "")
if not card_number.isdigit() or len(card_number) != 16:
return False # The card number must have exactly 16 digits
return luhn_algorithm(card_number)
# Example usage
test_credit_card = generate_random_credit_card()
print(f"Generated Credit Card Number: {test_credit_card}")
print(f"Card Type: {get_card_type(test_credit_card)}")
if validate_credit_card(test_credit_card):
print("The credit card number is valid.")
else:
print("The credit card number is not valid.")
