This is unrelated to my previous post about _diff_wrt: The problem:
In [5]: f(g(x)).diff(x) Out[5]: Derivative(f(g(x)), g(x))*Derivative(g(x), x) Which according to the rest of SymPy should be Out[5]: Subs(Derivative(f(_x), _x), (_x,), (g(x),))*Derivative(g(x), x) It is nice to have _diff_wrt, however a Derivative instance with anything different than a symbol/dummy is complete nonsense. I hope that somebody can help me with this, because the current behavior of this function is nonsensical and blocks my work. -- You received this message because you are subscribed to the Google Groups "sympy" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/sympy?hl=en.
