How to swallow traceback message

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Hi,

I run my py app to display a file's contents, and it is normally very
long.
So I use it like below:

python myapp.py input_file | more
to see them step by step.

But when I try to exit it, normally I use Ctrl+ C key to quit it.
Problem is every time I do like it, it shows Traceback message and it
makes my app not professional.

How do I handle it gracefully.

TIA