python dont allow spaces code example

Example: how to block empty space python login

def nonb(message, error_message):

    x = input(message)
    while len(x.strip()) == 0:
        x = input(error_message)

    UserName = nonb('''         Enter Username:=> ''', '''         Enter a valid Username:=> ''')
    time.sleep(1)
    PassWord = nonb('''         Enter Password:=> ''', '''         Enter a valid Password:=> ''')