尝试/除外 - 如何继续

Question

So there is a part in my program where I ask the user to enter a number. I use try/exept as:

limits=True
while limits:
        try:
            limits=int(input("Put your limit:"))
            return limits
        except(ValueError):
            print("Thats not a number!")

My question is if the user does put in a number how can I continue to use the variable limits that contains the users input later on in my code?

After that the try/except part runs and when the user to put in a number it just stops, doesn't continue with the code.

Answer 1

You do not need limits at all in your code:

def get_limit():
    while True:
        try:
            return int(input("Enter your limit: "))
        except(ValueError):
            print("That's not a number!")

To use the value later in your code, just assign the return value from the function to some variable:

limit = get_limit()

Answer 2

What is this I don't even.

You're trying to make limits both a boolean for the while loop, and an integer for something else.

Try one of these methods:

• make a while loop that checks the validity of the input, rather than try to read it as a boolean
• make a while true loop, which will already break on the return statement if the input is correct.

tl;dr replace while limits with while true .