Re: [Jython-dev] Can't mutliple inhert from built in types

[Samuele P. <ped...@st...>]

Alexander Stoddard wrote:

> Greetings,
>
> I have been experimenting with jython2.2a1 and trying out the python 
> module BeautifulSoup.py.
>
> This uses classes like:
>
> class NavigableUnicodeString(unicode, NavigableString):
>      pass
>
> This fails under the latest jython build from cvs, even with the fix 
> for subclassing str.
> The following shows an example of the problem:
>
> >>>  class myClass:
> ...    def foo(self):
> ...      print "myClass foo called."
>
> >>> class myMulti(str, myClass):
> ...    pass
> ...
>
> >>> t = myMulti()
> >>> type(t)
> <class '__main__.myMulti'>
>
> >>> t.foo()
> Traceback (innermost last):
>   File "<console>", line 1, in ?
> AttributeError: 'string' object has no attribute 'foo'
>
> The same problem is seen if I inherit from "dict" instead of "str" so 
> it seems to be a more general  problem.
>
> Should this be a bug report or is it a known limitation at the moment?
>
it's a known limitation that is going to stay with us for a while. You 
can mix old style classes with Java classes in subclassing but not
new-style classes.

> Thank you,
> Alex Stoddard
>
>
>
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