Back9 wrote:
> 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.
Step 1, provoke the error:
$ python -c"while 1: print 42" | head -n1
42
Traceback (most recent call last):
File "<string>", line 1, in <module>
IOError: [Errno 32] Broken pipe
Step 1a, read the error message carefully ;)
Step 2, catch the error:
$ python -c"try:
while 1: print 42
except IOError as e:
if e.errno != 32: raise
" | head -n1
42
Step 3, repeat if necessary. IOError is only one example.
Peter
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