Julia lambdify simpy expression: sympy_to_symbolics ?

[mmikhasenko]

The question that came today in discussion with redeboer on ampform.

Since simplification of some special functions works only in simpy currently,
I would like to convert the simpy output to Simbolics.jl objects in order to lambdify in julia.
Is it possible, straightforward?

┆Issue is synchronized with this Trello card by Unito

[redeboer]

Thanks for posting this question @mmikhasenko!
For context: I was originally wondering whether it's an idea to implement lambdification from sympy/SymPy.jl to Julia code. (But maybe better to post that in the sympy repo?)

[mmikhasenko]

I also run Simpy.jl and getting the sumpy objects.
Julia code is used for the numerical approach, I am looking forward to Simbolics.jl to place the gap. But there might be a shortcut with simply conversion already now.

I believe it is easiet to do on Julia's side the python side.

Let's see what the experts will say

[ChrisRackauckas]

There's a partial PR and some functions on it already. You might want to help finish #351

[mmikhasenko]

wwhuyyy! I can certainly test it on my case

[mmikhasenko]

looking more carefully, it seems that we need the opposite operation to what is discussed
not symbolics_to_sympy, but rather sympy_to_symbolics. It does not seem to exist.

Am I missing something?

[ChrisRackauckas]

Oh yes, good point. We need the other direction.