Exit program without triggering exception handling

Question

I wasn't really sure how to title my question, but my issue is this; I have my program set up to guess a number and handle exceptions. The program loops until the number is guessed, but when the program exits, my exception message shows at the same time. How can I fix this?

num = None
while num != 31:
    try:
        num = int(input("What is the age of my creator? \n"))
        if num < 31:
            print("Higher! Guess again! \n")
        elif num > 31:
            print("Lower! Guess again! \n")
        elif num == 31:
            print("Good Guess!")
            exit()
    except:
        print("Numbers only! \n")

This is my output:

What is the age of my creator? 31 Good Guess! Numbers only!

Process finished with exit code 0

cs95 · Accepted Answer · 2017-08-18T02:07:52.633

1

If you want to keep the exception message, I would recommend a break instead of exit, for a more natural exit from your program. Try this:

try:
    ...
    elif num == 31:
        print("Good Guess!")
        break
except ValueError:
    print("Numbers only! \n")

Also, you should catch a specific error rather than a catch-all bare except.

If you want to silence any error messages, you should use pass instead. From the docs:

The pass statement does nothing. It can be used when a statement is required syntactically but the program requires no action.

try:
    ...
except ValueError:
    pass

pass is an innocuous placeholder statement that does nothing.

How To Use The Pass Statement In Python

edited Aug 18 '17 at 02:07

answered Aug 18 '17 at 01:54

cs95

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I tried it. It changes nothing. This is my output: What is the age of my creator? 31 Good Guess! Numbers only! Process finished with exit code 0 – Orpha Mortimer Aug 18 '17 at 01:56
@OrphaMortimer 1. No print statement after pass. 2. Save your file. – cs95 Aug 18 '17 at 01:56
Also, I recommend break inside `try`, rather than exit. – cs95 Aug 18 '17 at 01:57
I removed the print statement. The output looks better, but how could I do the same while keeping the exception print statement? – Orpha Mortimer Aug 18 '17 at 02:00
@OrphaMortimer Like I said, use a `break` instead of `exit`. – cs95 Aug 18 '17 at 02:00
ahhh!! Thanks a lot! – Orpha Mortimer Aug 18 '17 at 02:02
@OrphaMortimer Also avoid using plain `except:` and use a more specific one like `except ValueError:` in your case – Mohd Aug 18 '17 at 02:05
Thanks, added that in. – cs95 Aug 18 '17 at 02:07

Exit program without triggering exception handling

1 Answers1