Re: [Jython-users] Incompatibility of Python in the JVM

[Joshua F. <jo...@jo...>]

Thanks,

I see that Jython does in fact allow mult. inh., but not for inheritance 
from java.

I am wondering if there are any points where the JVM limits the full 
flexible use of Python -- perhaps there are none. Microsoft claims that the 
.NET Common Language Runtime is designed to be cross-language compatible, 
but Jython seems to be good evidence that the JVM has that kind of flexibility.

At 08:01 AM 3/8/2002 -0700, you wrote:


>Joshua Fox wrote:
>
>>a ban on Python multiple inheritance
>
>
>You can use MI if you don't inherit from multiple
>Java classes.  All these uses of MI work correctly:
>
> >>> class A:
>...   def a(self): print 'a'
>...
> >>> class B:
>...   def b(self): print 'b'
>...
> >>> class C(A,B):
>...   pass
>...
> >>> c=C()
> >>> c.a()
>a
> >>> c.b()
>b
> >>> import java
> >>> class D(A,java.lang.Object):
>...   pass
>...
> >>> d=D()
> >>> d.a()
>a
> >>> d.toString()
>'org.python.proxies.__main__$D$0@23b9c1'
> >>> class E(java.lang.Object,java.io.Serializable):
>...   pass
>...
> >>> e=E()
>
>This doesn't:
>
> >>> class F(java.lang.Number,java.util.Date):
>...   pass
>...
>Traceback (innermost last):
>   File "<console>", line 1, in ?
>TypeError: no multiple inheritance for Java classes: java.util.Date and 
>java.lan
>g.Number
>