On Jan 17, 1:33 pm, "Gabriel Genellina" <gagsl-...@yahoo.com.ar> wrote: > En Sat, 17 Jan 2009 08:16:14 -0200, Dragos <dragosmoc...@gmail.com> > escribió: > > > > > On Jan 17, 11:48 am, "Gabriel Genellina" <gagsl-...@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! > > Tryhttp://en.wikipedia.org/wiki/Abstract_class > 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. -- http://mail.python.org/mailman/listinfo/python-list
