Get random sample from list while maintaining ordering of items?

Question

I have a sorted list, let say: (its not really just numbers, its a list of objects that are sorted with a complicated time consuming algorithm)

mylist = [ 1          


        

Answer 1

random.sample implement it.

>>> random.sample([1, 2, 3, 4, 5],  3)   # Three samples without replacement
[4, 1, 5]