Sorting Dataframe By Multiple Values

Generating random data.

import pandas as pd
import numpy as np
            
sample_df = pd.DataFrame({'x-val':[1,1,1,2,2,2], 'y-val':np.random.rand(6), 'z-val':np.random.rand(6)})
sample_df

	x-val	y-val	z-val
0	1	0.866973	0.074644
1	1	0.945542	0.239148
2	1	0.451685	0.073848
3	2	0.100797	0.684813
4	2	0.105647	0.054043
5	2	0.110734	0.830431

Implementing sorting of x-val and y-val where x-val is descending and y-val is ascending

sample_df.sort_values(by=['x-val', 'y-val'], ascending=[False, True])

	x-val	y-val	z-val
3	2	0.100797	0.684813
4	2	0.105647	0.054043
5	2	0.110734	0.830431
2	1	0.451685	0.073848
0	1	0.866973	0.074644
1	1	0.945542	0.239148