Group Python List Elements

Question

I have a python list as follows:

my_list = 

 [[25, 1, 0.65],
 [25, 3, 0.63],
 [25, 2, 0.62],
 [50, 3, 0.65],
 [50, 2, 0.63], 
 [50, 1, 0.62]]

Answer 1

Use the following:

my_list = [[25, 1, 0.65], [25, 3, 0.63], [25, 2, 0.62], [50, 3, 0.65], [50, 2, 0.63], [50, 1, 0.62]]

list_25 = sorted([item for item in my_list if item[0] == 25], key=lambda item: item[1])
list_50 = sorted([item for item in my_list if item[0] == 50], key=lambda item: item[1])

res = [[i[2], j[2]] for i,j in zip(list_25, list_50)]

Output:

>>> res
[[0.65, 0.62], [0.62, 0.63], [0.63, 0.65]]