Yes, the problem was that I hadn't imported anydbm.error... it's
working now.
As for the AttributeError at the end, I talked to someone else, and he
looked at the source and said it was a bug in shelve. I think I will
report it to python.org.
Anyway, thanks :).
Simon Forman wrote:
> [EMAIL PROTECTED] wrote:
> > I tried what you said and it looked like maybe AttributeError, but that
> > didn't work either.
> >
> > This code snippet:
> >
> > import shelve
> > from traceback import format_exc
> >
> > try:
> > db = shelve.open("meh", "r")
> > except:
> > print format_exc()
> >
> > Gave me this output:
> > Traceback (most recent call last):
> > File "test.py", line 5, in ?
> > db = shelve.open("meh", "r")
> > File "/usr/lib/python2.4/shelve.py", line 231, in open
> > return DbfilenameShelf(filename, flag, protocol, writeback, binary)
> > File "/usr/lib/python2.4/shelve.py", line 212, in __init__
> > Shelf.__init__(self, anydbm.open(filename, flag), protocol,
> > writeback, binary)
> > File "/usr/lib/python2.4/anydbm.py", line 77, in open
> > raise error, "need 'c' or 'n' flag to open new db"
> > error: need 'c' or 'n' flag to open new db
> >
> > Exception exceptions.AttributeError: "DbfilenameShelf instance has no
> > attribute 'writeback'" in ignored
> >
> > Do you know what the error is?
>
> No. If you tried catching AttributeError and it didn't work then I'd
> guess that the AttributeError is a secondary result of the initial
> error.
>
> This part of the traceback,
>
> > File "/usr/lib/python2.4/anydbm.py", line 77, in open
> > raise error, "need 'c' or 'n' flag to open new db"
> > error: need 'c' or 'n' flag to open new db
>
> indicates that some sort of custom error, probably defined in the
> anydbm.py module.
>
> Catching the execption and binding it to a var,
>
> >>> try:
> ... db = shelve.open("meh", "r")
> ... except Exception, err:
> ... E = err
> ...
> Exception exceptions.AttributeError: "DbfilenameShelf instance has no
> attribute 'writeback'" in ignored
> >>> E
> <anydbm.error instance at 0xb7d8270c>
>
>
>
> So:
> >>> from anydbm import error
> >>> try:
> ... db = shelve.open("meh", "r")
> ... except error:
> ... print 'Aha! got it!'
> ...
> Aha! got it!
> Exception exceptions.AttributeError: "DbfilenameShelf instance has no
> attribute 'writeback'" in ignored
>
>
> Well, that catches the error, but I don't know what's going on with the
> additional AttributeError or what to do about it.
>
> Peace,
> ~Simon
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