FileCookieJar has not attribute "_self_load"
dragosmocrii at gmail.com
Sat Jan 17 13:38:23 CET 2009
On Jan 17, 1:33 pm, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> En Sat, 17 Jan 2009 08:16:14 -0200, Dragos <dragosmoc... at gmail.com>
> > On Jan 17, 11:48 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
> > wrote:
> >> En Fri, 16 Jan 2009 17:19:47 -0200, escribiste en el grupo
> >> gmane.comp.python.general
> >> > I am trying to make a testing script to load/save cookies to a file
> >> > with FileCookieJar, but it results in this error: FileCookieJar has
> >> > not attribute "_self_load"
> >> FileCookieJar is an abstract class, although it isn't clear at all from
> >> the documentation. (You may want to file a documentation bug
> >> athttp://bugs.python.org)
> >> You must instantiate a specific subclass (like MozillaCookieJar), which
> >> determines the actual file format used.
> > Oh, thank you so much.
> > Using MozillaCookieJar works just fine.
> > But could you please explain what an abstract class is (or where i can
> > find documentation for this term). Thanks!
> In short, it's an incomplete class, with "holes" that subclasses must fill
> in order to get a complete, working class (a "concrete" class, as opposed
> to the "abstract" base).
> If you look at FileCookieJar, its load() method calls self._really_load
> but no such method exists in that class nor its ancestors (this explains
> the error you got). Subclasses of FileCookieJar *must* implement
> _really_load to be usable.
> It's customary to define the method anyway, and raise NotImplementedError;
> this serves two purposes:
> - document the expected interfase
> - error messages are more meaningful
> (FileCookieJar.save() is implemented this way; _really_load() should be
> the same)
> Gabriel Genellina
Thanks, got it.
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