On Tue, 09 Apr 2013 06:19:09 -0700, cabbar wrote:
> How do I
> handle all other exceptions, just say Exception: and handle them? I want
> to silently ignore them.
Please don't. That is normally poor practice, since it simply hides bugs
in your code.
As a general rule, you should only catch exceptions that you know are
harmless, and that you can recover from. If you don't know that it's
harmless, then it's probably a bug, and you should let it raise, so you
can see the traceback and fix it. In the words of Chris Smith:
"I find it amusing when novice programmers believe their
main job is preventing programs from crashing. ... More
experienced programmers realize that correct code is
great, code that crashes could use improvement, but
incorrect code that doesn’t crash is a horrible nightmare."
One exception to this rule (no pun intended) is that sometimes you want
to hide the details of unexpected tracebacks from your users. In that
case, it may be acceptable to wrap your application's main function in a
try block, catch any unexpected exceptions, log the exception, and then
quietly exit with a short, non-threatening error message that won't scare
the civilians:
try:
main()
except Exception as err:
log(err)
print("Sorry, an unexpected error has occurred.")
print("Please contact support for assistance.")
sys.exit(-1)
Still want to catch all unexpected errors, and ignore them? If you're
absolutely sure that this is the right thing to do, then:
try:
code_goes_here()
except Exception:
pass
But really, you shouldn't do this.
(For experts only: you *probably* shouldn't do this.)
--
Steven
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