[sage-support] Re: Number of operands in an expression

[ma...@mendelu.cz]

On 21 Bře, 07:05, Craig Citro <craigci...@gmail.com> wrote:
> > That works well, but what about when the expression is multivariate,
> > such as:
>
> > expand((1+x+1/y)^10)
>
> > It would be nice to have a general command to count the number of
> > summands in such an expression.
>
> Yep, I agree. Here is a *terrible* way to do it:
>
> sage: var('x,y')
> (x, y)
> sage: f = x+y + 1
> sage: len(expand(f._maxima_()))
> 3
> sage: len(expand((f**4)._maxima_()))
> 15
>
I think that better way is to use maxima commands op, args, length,
atomp

Robert Marik
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