Is there a library function to compute the Riemann Theta function (not Zeta) in sympy/sage/Python?
I have looked at the docs and can't find anything but I wonder if I have just missed it under a different name maybe.
As an example of what I would like to do, here is some Maple code.
> evalf(RiemannTheta([0,0],Matrix([[3*I/Pi, 0],[0,3*I/Pi]])));
1.2090903064 + 0. I