Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 19 - I'm losing it

Python
1

Can someone explain me what I’m doing wrong here?

Your code so far


# User Editable Region

def verify_card_number(card_number):
    sum_of_odd_digits = 0
    card_number_reversed = card_number[::-1]
    odd_digits = card_number_reversed[::2]

for digit in odd_digits:
    print(digit)    

# User Editable Region

def main():
    card_number = '4111-1111-4555-1142'
    card_translation = str.maketrans({'-': '', ' ': ''})
    translated_card_number = card_number.translate(card_translation)

    verify_card_number(translated_card_number)

main()

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/120.0.0.0 Safari/537.36

Challenge Information:

Learn How to Work with Numbers and Strings by Implementing the Luhn Algorithm - Step 19

2

Can you be more specific about what is confusing?

It looks like the error message is

Your code raised an error before any tests could run. Please fix it and try again.

for digit in odd_digits:

The variable odd_digits isn’t defined here, so that’s definitely a problem. Your for loop needs to be placed where odd_digits is in scope.

3

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