I am getting output in object datatype. I wanted float data output, but that gives “ValueError: setting an array element with a sequence” error. The extract of code is shown below

```
W = FunctionSpace(mesh, MixedElement([Ve, Re]))
dv = TrialFunction(W)
w=Function(W)
(v, lamb) = split(w)
dx = Measure('dx')(subdomain_data=subdomains)
def eps(v):
return as_vector([0,v[1].dx(0),v[1].dx(0),v[1].dx(0),v[1].dx(0),v[0].dx(0)])
lmbda=2*10^9
mu=3*10^9
C1=2*lmbda+mu
C=Constant([(C1,lmbda,lmbda,0,0,0),(lmbda,C1,lmbda,0,0,0),(lmbda,lmbda,C1,0,0,0),(0,0,0,mu,0,0),(0,0,0,0,mu,0),(0,0,0,0,0,mu)])
solve (a==L,w)
DD = np.zeros((6,),dtype =object)
for p in range(6):
DD[p]=assemble(sum([dot(C,eps(dv))[p]*dx]))/vol
print(DD[0])
<dolfin.cpp.la.Vector at 0x7f6d5fa2e7a0>
print(DD[0]+100)
<dolfin.cpp.la.Vector at 0x7f6d64b65f80>
```

I wanted to get float values of DD matrix. If I add some number like 100, then it shows different location as shown above.

If I remove the dtype from DD, it gives the following error

```
DD = np.zeros((6,))
for p in range(6):
DD[p]=assemble(sum([dot(C,eps(dv))[p]*dx]))/vol
TypeError Traceback (most recent call last)
TypeError: float() argument must be a string or a real number, not 'dolfin.cpp.la.Vector'
The above exception was the direct cause of the following exception:
ValueError Traceback (most recent call last)
/tmp/ipykernel_238/738355618.py in <module>
2 for p in range(6):
3 for q in range(6):
----> 4 DD[p,q]=assemble(sum([outer(dot(Com(i),eps(dv)),V)[p,q]*dx(i) for i in range(nphases)]))/vol
5
ValueError: setting an array element with a sequence.
```

Kindly help me for getting DD in float/ real number output.