[Zope] isinstance not working

[Andrew Altepeter]

On Fri, 2003-01-24 at 14:15, Andreas Jung wrote:
> I think the problem is that ExtensionClasses don't work with isinstance()

If this is the case, then there must be a workaround, right?

Andy

> 
> -aj
> 
> --On Freitag, 24. Januar 2003 13:38 -0600 Andrew Altepeter 
> <aaltepet@bethel.edu> wrote:
> 
> > Hi All,
> >
> > I am developing a custom user folder (based off of
> > AccessControl.UserFolder code, and SimpleUserFolder), which inherits
> > from BasicUser.
> >
> > There are two types of users in this folder, one is the
> > AccessControl.User, and the other is a subclass of it.
> >
> > Inside getUserNames, I am trying to use isinstance, but it isn't
> > working.  It returns:
> >
> >>> TypeError: isinstance() arg 2 must be a class or type
> >
> > Here's the code that I'm using:
> >
> > class PortalUser(User):
> >     __doc__ = """This is the class for PortalUsers"""
> >
> > class PortalUserFolder(BasicUserFolder):
> >  ...
> >  ...
> >      """Return a sorted list of usernames"""
> >     def getUserNames(self,luser=1,puser=1):
> >         names = self.local_data.keys()
> >         names.sort()
> >         if (luser==1 and puser!=1):
> >             for name in names[:]:
> >                 if (isinstance(name,PortalUser)):
> >                     names.remove(name)
> >         elif (luser!=1 and puser==1):
> >             for name in names[:]:
> >                 if not (isinstance(name,PortalUser):
> >                     names.remove(name)
> >         return names
> >
> > Any ideas as to what's going on here, or why this is not working would
> > be great!  Oh, I've also tries using PortalUserFolder, and User as arg2
> > to isinstance.
> >
> > Thanks!
> >
> > Andy
> >
> >
> >
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> 
> 
> 
>     ---------------------------------------------------------------------
>    -    Andreas Jung                     http://www.andreas-jung.com   -
>   -   EMail: andreas at andreas-jung.com                              -
>    -            "Life is too short to (re)write parsers"               -
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>