On 11 ago, 00:13, Aaron Meurer <[email protected]> wrote:
> Perhaps the use() function can do what you want. Here's the docstring:
>
> use(expr, func, level=0, args=(), kwargs={})
> Use ``func`` to transform ``expr`` at the given level.
>
> Example
> =======
>
> >>> from sympy import use, expand
> >>> from sympy.abc import x, y
>
> >>> f = (x + y)**2*x + 1
>
> >>> use(f, expand, level=2)
> x*(x**2 + 2*x*y + y**2) + 1
> >>> expand(f)
> x**3 + 2*x**2*y + x*y**2 + 1
Thanks. I will test if "use" can be used in my case.
> > By the way, if you are using this to map integrate() across an Add,
> might I suggest that this is a bad idea. It turns out that you cannot
> just do this, like you can with derivatives. The reason is that you
> can have a sum for which each term it does not have an expressible
> integral, but the whole sum does.
No, "mapexpr" is being use to simplify the result of "integrate",
so the user has many options to see the final result.
Best regards,
Roberto
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