Complex Calculate using complex solutions of variational formulation

variational formulation
11

I have tried the demo in

Implementation — FEniCSx tutorial

And I find there are some problem in “implementation” chapter
1.In Defining the variational problem, the code should be

a = ufl.inner(ufl.grad(u), ufl.grad(v)) * ufl.dx
L = ufl.inner(p, v) * ufl.dx

2.In Plotting the solution over a line，when the debuger run into

plotter.show()

Then going to “connected”.
I’m not sure whether there is any wrong. I just comment out these lines and go on.