You can transform an expression into a Python callable function with
lambdify

In [1]: f = lambdify(x, 100-2*x)

In [2]: f(2)
Out[2]: 96



On Mon, Jan 14, 2013 at 5:14 PM, Ben Lucato <[email protected]> wrote:

> Hi I have looked through the docs and other places online, but I haven't
> found an answer!
>
> Currently when working with functions I do this:
>
> from sympy import *
> f = Function('f')
> x = Symbol('x')
> f = 100 - 2 * x
>
> to evaluate f I have to do this:
> f.subs({x: 2})
> >>> 96
>
> which is a pain. Is there some way to define my function such that I can
> do:
> f(2)
> >>> 96
> ???
>
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