How to Catch 2 Exceptions at once?

John Machin sjmachin at lexicon.net
Sun Oct 1 04:28:26 CEST 2006


Gregory Piñero wrote:
> How can I catch 2 exceptions at once for example:
>
>         try:
>             self.gses = opener.open(req)
>         except (urllib2.HTTPError,urllib2.URLError):
>             do something..
>
> Seems to work, but how do I also get information about the error?

Errr .. the same way as if you mentioned only one exception. The
following is an expansion of the scarcely-describable-as-bare coverage
in the tutorial
(http://docs.python.org/tut/node10.html#SECTION0010300000000000000000):

C:\junk>cat gregpexc.py
import sys
try:
    fname = raw_input('File name:')
    f = open(fname)
    i = 1 / 0
# except IOError, (errno, strerror):
#     print "I/O error(%s): %s" % (errno, strerror)
except (IOError, KeyboardInterrupt, ZeroDivisionError), e :
    print repr(e)
    print e
    print dir(e)
    print e.args
    print e.__class__.__name__
except:
    print "Unexpected error:", sys.exc_info()[0]
    # no example shown; read the fine manual :-)
    raise

C:\junk>python gregpexc.py
File name:<exceptions.KeyboardInterrupt instance at 0x00AF1EE0>

['__doc__', '__getitem__', '__init__', '__module__', '__str__', 'args']
()
KeyboardInterrupt

C:\junk>python gregpexc.py
File name:kl;lklklklk
<exceptions.IOError instance at 0x00AF1F08>
[Errno 2] No such file or directory: 'kl;lklklklk'
['__doc__', '__getitem__', '__init__', '__module__', '__str__', 'args',
'errno',
 'filename', 'strerror']
(2, 'No such file or directory')
IOError

C:\junk>python gregpexc.py
File name:gregpexc.py
<exceptions.ZeroDivisionError instance at 0x00AF1F08>
integer division or modulo by zero
['__doc__', '__getitem__', '__init__', '__module__', '__str__', 'args']
('integer division or modulo by zero',)
ZeroDivisionError

HTH,
John




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