Python style: exceptions vs. sys.exit()

Steven D'Aprano steve at
Thu Sep 25 04:15:46 CEST 2008

On Wed, 24 Sep 2008 17:11:28 -0400, Ross Ridge wrote:

> Plenty of people were quick to say that the exception should be passed
> through to the caller.  No one said this behaviour should be documented.
>  There may be little practical difference bewteen calling sys.exit()
> after printing an error and progating an exception if no one using the
> library knows that it could generate that exception in those
> circumstances.

That's true, I didn't explicitly say that the library should be 
documented. Nor did I say that it shouldn't be riddled with bugs. There's 
little practical difference between a buggy library and one that raises 
unexpected (i.e. undocumented) exceptions either.


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