On Sunday, August 19, 2018 at 1:42:29 PM UTC+2, Steven D'Aprano wrote:
> On Sun, 19 Aug 2018 03:15:32 -0700, giannis.dafnomilis wrote:
>
> > Thank you MRAB!
> >
> > Now I can get the corresponding dictionary value A[i,j,k,l] for each key
> > in the varsdict dictionary.
> >
> > However how would I go about multiplying the value of each
> > FEq_(i,_j,_k,_l) key with the A[i,j,k,l] one? Do you have any insight in
> > that?
>
> Do you want to modify the varsdict values in place?
>
> varsdict['Feq_(i,_j,_k,_l)'] *= A[i,j,k,l]
>
> which is a short-cut for this slightly longer version:
>
> temp = varsdict['Feq_(i,_j,_k,_l)'] * A[i,j,k,l]
> varsdict['Feq_(i,_j,_k,_l)'] = temp
>
>
>
> If you want to leave the original in place and do something else with the
> result:
>
> result = varsdict['Feq_(i,_j,_k,_l)'] * A[i,j,k,l]
> print(result)
>
> Do you want to modify the varsdict values in place?
>
> varsdict['Feq_(i,_j,_k,_l)'] *= A[i,j,k,l]
>
> which is a short-cut for this slightly longer version:
>
> temp = varsdict['Feq_(i,_j,_k,_l)'] * A[i,j,k,l]
> varsdict['Feq_(i,_j,_k,_l)'] = temp
>
>
>
> If you want to leave the original in place and do something else with the
> result:
>
> result = varsdict['Feq_(i,_j,_k,_l)'] * A[i,j,k,l]
> print(result)
>
Thanks again for your answers Steven. I will try to explain it simpler because
I think I tend to complicate things.
With your help I have arrived at this point:
I have the dictionary varsdict (size 5) as below
Key Type Size Value
FEq_(0,_0,_0,_0) float 1 1.0
FEq_(0,_0,_1,_1) float 1 1.0
FEq_(0,_0,_2,_2) float 1 1.0
FEq_(0,_0,_3,_0) float 1 1.0
FEq_(0,_0,_4,_1) float 1 1.0
and the dictionary B (size 150) as below
Key Type Size Value
FEq_(0,_0,_0,_0) float 1 1500.0
FEq_(0,_0,_0,_1) int 1 0
...
FEq_(0,_0,_1,_1) float 1 3300.0
...
FEq_(0,_0,_2,_2) float 1 2200.0
...
FEq_(0,_0,_4,_1) float 1 4000.0
for dictionary B the i,j,k,l ranges run as far as my input ranges when I
started the model. So now I only want to multiply the values with the same keys
with each other and get the sum of it.
result = Sum(varsdict['FEq_(i,_j,_k,_l)']*B['FEq_(i,_j,_k,_l)']
As I mentioned above I have been trying this with
{k : v * B[k] for k, v in varsdict.items() if k in B}
or
for key in varsdict:
if key in B:
print(int(varsdict[key]) * int(B[key]))
but all I get is an empty dictionary.
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