On 10/05/17 23:41, Dan Stromberg wrote:
On Wed, May 10, 2017 at 1:46 PM, MRAB <pyt...@mrabarnett.plus.com> wrote:
NEVER use a 'bare except' to suppress exceptions! It'll catch _all_
exceptions, even NameError (if you've misspelled a name, it'll catch that
too). Catch only those exceptions that you're prepared to deal with.
When writing many kinds of applications, this is great advice.
But is it good when writing REST API's? You don't want one buggy API
call to bring down the whole service.
Or am I missing something?
Yes. You are missing that you now have no idea what the code will go on
to do if it ignores the error. You now have a program that is running in
an entirely unexpected and unaccounted for state.
Perhaps it will be benign.
But, perhaps it will wipe an important part of the disk of your server
because a string that is expected to contain the name of a subdirectory
to be deleted actually still contains the root directory of your
application. That's a *much* harder way of "bringing down the whole
service" than having to just re-start the server process (which should
be an automatic thing anyway) ...
E.
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