Handling exceptions without exiting program

Question

4 my Pythonic ninjas... after handling the error msg I would like the program to goback asking the same question that first triggered the exception instead of exiting after dispalying error msg. Im assuming I have to insert some code right after the print statement handling the error msg however you know what they say about assuming....

Questions: Is there a function that can perform : 1- go back to the same question that caused the exception without exiting the program 2- alternatively reboot the program from the start.

Thanks for your time!!

Answer 1 · 2019-03-07T21:05:05Z

March 7, 2019 9:05pm

One easy technique is to wrap all the code from the question through the error handling in a "while True" loop. Then inside you can "break" to end the loop when you get an error-free result.

If the program is implemented as a function, another trick to cause a complete restart would be to call the main function (and then return) after handling an error.

Answer 2 · 2019-03-07T22:02:55Z

March 7, 2019 10:02pm

Thanks Steven !! I tried this to practice what you explained..I was really exited to see that it works ;) at first I had some issues with indentation and where to put the break but I finally managed please feel free to point out if I did something wrong.

while True:

    try:
        age = int(input("How old are you ? "))
        if age <=0:
            raise ValueError
        print("Ok you are ", age)
        break    
    except ValueError:
        print ("I Need a round number higher than 0 please try again ")

        #thanks to Steven P.

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Mikael D.D

Mikael D.D

Handling exceptions without exiting program

2 Answers

Steven Parker

Steven Parker

Mikael D.D

Mikael D.D

Steven Parker

Steven Parker