Awsome Python - chained exceptions
Serhiy Storchaka
storchaka at gmail.com
Fri Feb 15 13:51:21 EST 2013
On 14.02.13 08:39, Steven D'Aprano wrote:
> Here is one example of using raise to re-raise an exception you have just
> caught:
>
> import errno
> paths = ["here", "there", "somewhere else"]
> for location in paths:
> filename = os.path.join(location, "prefs.ini")
> try:
> f = open(filename)
> except IOError as e:
> if e.errno != errno.ENOENT: # File not found.
> raise
>
In Python 3.3:
try:
f = open(filename)
except FileNotFound:
pass
But not all errnos have special OSError subclasses.
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