String Checker, Invalid Input - Python

Question

It won't print do not leave username blank as it is invalid input when I press enter(blank input)

def strchecker(question):
    valid=False
    while not valid:
        user_Name = input(question)
        if user_Name!="":
            valid=True
            return user_name
        else:
            print("Do no leave username blank")

print("*************Welcome to the Te Reo Maori Quiz***************")
user_Name = str(input("Please enter your username"))

What version of Python are you using? If you are using Python 2, you should use raw_input instead of input — Patrick Haugh
– Patrick Haugh, Commented Jun 28, 2018 at 21:52

Hypnotron · Accepted Answer · 2018-06-28 22:06:47Z

1

You haven't actually called the function; that's probably why it's not working. Try this:

def strchecker(question):
    while True:
        user_Name = input(question)
        if user_Name:
            return user_Name  # Make sure to capitalize the N in user_Name
            break
        else:
            print("Do no leave username blank")

print("*************Welcome to the Te Reo Maori Quiz***************")
user_Name = strchecker("Please enter your username")

This should work.

edited Jun 28, 2018 at 22:06

answered Jun 28, 2018 at 21:56

Hypnotron

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2 Comments

Ari K Over a year ago

One redundancy I would remove in your post (and the OP's) is re-assigning the user_Name variable within strchecker. You don't need to do that

Ari K Over a year ago

@Jade make sure you're careful about naming your variables! :). user_Name is different than user_name

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