On Apr 25, 2009, at 12:40 AM, Alex Ghitza wrote:
>
>>
>> Translation, if it's not clear. It got a coercion map f, tried to
>> call f(x), and f(x) returned None which is clearly a bug for whoever
>> implemented the morphism in question.
>>
>
> That helped me track it down to
>
> {{{
> sage: X = Spe
>
> Translation, if it's not clear. It got a coercion map f, tried to
> call f(x), and f(x) returned None which is clearly a bug for whoever
> implemented the morphism in question.
>
That helped me track it down to
{{{
sage: X = Spec(ZZ)
sage: H = Homset(X, X)
sage: H(X.identity_morphism())
}}}
On Apr 24, 2009, at 11:29 PM, Alex Ghitza wrote:
>
>>
>> Try calling canonical_coercion explicitly. What error is being
>> thrown!?
>>
>
> Right. Here goes:
>
> {{{
> sage: X = Spec(ZZ)
> sage: f = X.identity_morphism(); g = X.identity_morphism()
> sage: canonical_coercion(f, g)
> ERROR: An u
>
> Try calling canonical_coercion explicitly. What error is being thrown!?
>
Right. Here goes:
{{{
sage: X = Spec(ZZ)
sage: f = X.identity_morphism(); g = X.identity_morphism()
sage: canonical_coercion(f, g)
ERROR: An unexpected error occurred while tokenizing input
The following traceback ma
On Fri, Apr 24, 2009 at 11:05 PM, Alex Ghitza wrote:
>
> Hi,
>
> I'm still working on fixing up schemes/generic/morphism.py, and I'm
> still having trouble with comparisons. I have written __cmp__()
> methods, but they don't seem to be called. Here's a concrete example.
> The definition of __c
