Re: Null reference

On 2003.11.25 12:05, renz@xxxxxxxxxxxxxxxx wrote:
> I ran into a problem, but not sure whether it is a SWIG or Python
> problem.
>
> >>> import mod
> >>> None in (mod.v(1), None)
> Traceback (most recent call last):
>   File "<stdin>", line 1, in ?
>   File "mod.py", line 38, in __eq__
>     def __eq__(*args): return apply(_mod.v___eq__,args)
> TypeError: null reference
>
> This error does not occur if operator == is not defined.  Why == is
> called here anyway?

I guess it's because
> > > None in (mod.v(1), None)
is implemented as:
> > > mod.v(1) == None or None == None
hence the call to __eq__. But as Dave said, you cannot pass it a null  
pointer (that's what None is translated into). You might have to  
rewrite the failing expression in order to avoid this.

Cheers,
        Luigi
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