I want to paint a bar chart where I can see 2 different levels in the same group, for example:
|pd.dataframe|category| col1 | col2 |
| 1 | row 1 | 3 | 7 |
| 1 | row 2 | 2 | 5 |
| 2 | row 1 | 2 | ... |
I would like to plot in the same image two columns together for each different index. In one column, I pretend to plot values of row_1 and row_2 in a related/stacked mode
bar1 = [3+7,2+5]
and plot in the second bar info of columns
bar2 = [3+2, 7+5]
plotting both in a grouped form
Here you can see an example. I found cases in plotly.js, but I can't find nothing about Python case.
Here you can see an example 
