dolfin team mailing list archive

[Garth Wells <606343@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

The below program throws the error:

File "demo.py", line 19, in <module>
    A.mult(x, y)
TypeError: in method 'GenericMatrix_mult', argument 2 of type 'dolfin::GenericVector const &'


from dolfin import *

mesh = UnitSquare(32, 32);
V = FunctionSpace(mesh, "CG", 1)

v = TestFunction(V)
u = TrialFunction(V)
f = Constant(1.0)
a = v*u*dx
L = v*f*dx

A = assemble(a)
b = assemble(L)
y =  Vector(b.size())

print A
print b
print y
A.mult(x, y)

** Affects: dolfin
     Importance: Medium
     Assignee: Johan Hake (johan-hake)
         Status: Confirmed

** Changed in: dolfin
       Status: New => Confirmed

** Changed in: dolfin
     Assignee: (unassigned) => Johan Hake (johan-hake)

** Changed in: dolfin
   Importance: Undecided => Medium

-- 
GenericMatrix::mult doesn't work from Python
https://bugs.launchpad.net/bugs/606343
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Status in DOLFIN: Confirmed

Bug description:
The below program throws the error:

File "demo.py", line 19, in <module>
    A.mult(x, y)
TypeError: in method 'GenericMatrix_mult', argument 2 of type 'dolfin::GenericVector const &'


from dolfin import *

mesh = UnitSquare(32, 32);
V = FunctionSpace(mesh, "CG", 1)

v = TestFunction(V)
u = TrialFunction(V)
f = Constant(1.0)
a = v*u*dx
L = v*f*dx

A = assemble(a)
b = assemble(L)
y =  Vector(b.size())

print A
print b
print y
A.mult(x, y)