I was trying to run a simple tutorial script:
from dolfin import * mesh = UnitSquareMesh(32, 32) (x, y) = SpatialCoordinate(mesh) element = FiniteElement("Lagrange", mesh.ufl_cell(), 1) V = FunctionSpace(mesh, element) u = Function(V) v = TestFunction(V) f = Constant(-6.0) g = 1 + x**2 + 2*y**2 bc = DirichletBC(V, g, DomainBoundary()) F = inner(grad(u), grad(v))*dx - f*v*dx solve(F == 0, u, bc) print(errornorm(g,u, norm_type = "l2"))
using Python 3 and Docker. However, I get the following error message:
Traceback (most recent call last): File "01.py", line 15, in <module> print(errornorm(g, u, 'L2')) File "/usr/local/lib/python3.6/dist-packages/dolfin/fem/norms.py", line 246, in errornorm degree_u = u.ufl_element().degree() AttributeError: 'Sum' object has no attribute 'ufl_element'
Since I could not find anything similar online I decided to make this post. Could someone help me out?