On 11/21/2011 7:09 AM, Mel Wilson wrote:
GZ wrote:
Here is my situation. A parent object owns a list of files (or other
objects with a close() method). The close() method can sometimes fail
and raise an exception. When the parent object's close() method is
called, it needs to close down as many files it owns as possible, even
if the close() function of some files fail. I also want to re-raise at
least one of the original exceptions so that the outer program can
handle it.
[ ... ]
It will re-raise the first exception and preserve the context and
close as many other files as possible while ignoring any further
exceptions.
But this looks really awkward. And in the case that two files fail to
close, I am not sure the best strategy is to ignore the second failure.
I imagine you could save any caught exception instances in a list and
study them later.
Yes, I would raise a custom exception instance that takes such a list of
failures in its constructor. Give it a custom __str__ method to display
them all.
--
Terry Jan Reedy
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