FileCookieJar has not attribute "_self_load"
gagsl-py2 at yahoo.com.ar
Sat Jan 17 12:33:48 CET 2009
En Sat, 17 Jan 2009 08:16:14 -0200, Dragos <dragosmocrii at gmail.com>
> On Jan 17, 11:48 am, "Gabriel Genellina" <gagsl-... at yahoo.com.ar>
>> En Fri, 16 Jan 2009 17:19:47 -0200, escribiste en el grupo
>> > 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
>> 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
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