sympy

[Steven D'Aprano]

On Thu, 31 Mar 2016 02:23 am, Poul Riis wrote:

> What I intend to do is to let sympy find the derivative of some
> welldefined function and next define the foundation derivative as a normal
> function so that I can calculate numerical values or even make a graph.


I'm glad you explained what you *actually* wanted, because I was going to
guess that you wanted to evaluate the derivative at x = 3:


py> ftext.evalf(subs={x:3})
-0.0600000000000000



-- 
Steven