Problem with concatenating two dataframes

[MRAB]

On 2021-11-06 20:12, Mahmood Naderan wrote:
> >Try this instead:
> >
> >
> >    dict[name] = pd.concat([dict[name], values])
>
>
> OK. That fixed the problem, however, I see that they are concatenated vertically. How can I change that to horizontal? The printed dictionary in the end looks like
>
>
> {'dummy':     Value
> M1      0
> M2      0
> M3      0, 'K1':    Value
> 0     10
> 1      5
> 2     10
> 6      2
> 7      2
> 8      2, 'K2':    Value
> 3     20
> 4     10
> 5     15}
>
>
>
> For K1, there should be three rows and two columns labeled as Value.
>
The second argument of pd.concat is 'axis', which defaults to 0. Try 
using 1 instead of 0.