Except, task isn't done yet. One of the errors isn't user friendly at all.

Hi..

to fix this I just added this "if" statement after "try" block.

try:
    if not num_tickets.isdigit():
        raise ValueError("Please enter a valid whole number between 1 and {}".format(tickets_remaining))

    num_tickets = int(num_tickets)

    if num_tickets > tickets_remaining:
        raise ValueError("There are only {} tickets remaining".format(tickets_remaining))

str.isdigit(): This is a string method. Return true if all characters in the string are digits and there is at least one character, false otherwise. in other words, A string is considered a digit string if all characters in the string are digits and there is at least one character in the string.

Here, we want to check for error: if the user input is a normal string like "blue" which is not a digit string, so we can output error message telling him that his input is invalid and he must enter a valid number

So, I used not keyword here after if to get the opposite value from the check ... which is False .. you could write it like this and it still work:

if num_tickets.isdigit() == False:
        raise ValueError("Please enter a valid whole number between 1 and {}".format(tickets_remaining))

Hope that helps... and sorry if my English isn't that clear :)

Hi there, Nuno Martins! You are entirely correct. That error isn't user-friendly at all, but it's not really meant to be, I don't think. Part of that error is generated by the Python interpreter. What it's saying is that you entered a string that cannot be converted to a number. For instance, Python can convert the string "42" to an integer, but it cannot convert "Treehouse" to an integer. This is when we get a ValueError. A string is a valid data type for the int() function, but not all strings can successfully be converted to an integer. The word "oranges" is one of them. When we pass in a value that is of the correct data type, but it still cannot be done, we encounter a ValueError.

In this line here, we're taking care of that ValueError and printing something to the user:

print("Oh no, we ran into an issue. {}. Please try again".format(err))

See that err there? It contains this string invalid literal for int() with base 10: 'oranges' which simply means that something was put in that it cannot convert to an integer. But it's this part that's not entirely user-friendly. You could decide to not print Python's error message at all and do a more generic error message like this:

print("Oh no, we ran into an issue. Could not convert your input into a number. Please try again")

Hope this helps and you're doing great!

Thanks for the fast reply, you really did help me!

Cheers.