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Python

Posted by Hina K.
Hina K.
4,806 Points

Help with Raise ValueError in Python

money_needed = 500

while money_needed > 1:
    print("We need {} dollars.".format(money_needed))
    name = input("Hello, may I have your name? ")
    answer = input("{}, would you like to help plan Maya's birthday? yes/no? ".format(name))
    if answer.lower() == 'yes':
        try:
            contribution = float(input("How much would you like to contribute? "))
            money_needed = money_needed - contribution
            if contribution < 1:
                raise ValueError("Please donate $1 or more. Thank you.")
        except ValueError as err:
            print("Oh no. Not valid. Try again.")
    else:
        print("No worries. I hope you have a great day.")

Why is my message is not printing when I raise the ValueError ("Please donate $1 or more. Thank you")

1 Answer

Steven Parker
Steven Parker
231,007 Points
Steven Parker
Steven Parker
231,007 Points

Passing the message as an argument to the raise makes it available to the handler, but you still need to print it out in the handler. Either by itself:

    print(err)

Or, as part of a larger message:

    print("Oh no. Not valid. " + str(err) + "  Try again.")