Exceptions

Exceptions are defined in python by using a try block followed by an except (catch) block. You can listen for a particular kind of error, or just catch all. You can also have an else block which will run if no exception was thrown, or a finally block which will run regardless of whether or not an exception was thrown.

try:
    num = 5
    string = "string"

    result = num + string
except TypeError as err:       # Put type of error after except
    print("Looks like you did something wrong... %s" % err)
else:
    print("You did everything right!")
    print(result)
finally:
    print("I happen at the end no matter what")


def ask_for_int():
    while True:
        try:
            result = int(input("Provide a number:"))
        except:
            print("You have to give a number")
            continue
        else:
            print("Thank you!")
            break