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Python Python Basics All Together Now Handle Exceptions

Ali AlRabeah
Ali AlRabeah
909 Points
Posted by Ali AlRabeah
Ali AlRabeah
909 Points

Is err equal to whatever ValueError we raised beforehand?

In these lines of codes, is err in line 5 equal to raise in line 4? Is this always the case? If so, what happens when you have multiple "raise ValueError"'s before and err?

try:
    tickets_selected = int(tickets_selected)
    if tickets_selected > tickets_remaining:
        raise ValueError("We don't have that many tickets")
except ValueError as err:
    print("That's an invalid answer. {}. Please try again.".format(err))

What does "except ValueError as err" actually mean and what does "err" represent?

1 Answer

Kyle Blaine
Kyle Blaine
3,359 Points
Kyle Blaine
Kyle Blaine
3,359 Points

From my understanding (and I hope to be corrected if I'm wrong), "except ValueError as err:" is basically saying: "Take this ValueError we just raised, and put it into a new variable we'll call "err", so that we can do something with it." In this case, print it out so it's visible to the user, without crashing the program.