Very beginner but please help!

[buran]

random.sample returns list. But you put this in square brackets, so it becomes list of lists with one element,e .g.
[[93, 15, 58, 11, 35, 67, 36, 33, 42, 63]]
you can easily check this if print it immediately after line 5.

import random
 
 
def listing():
    lst = random.sample(range(1,100),10)
    return [lst[0], lst[-1]]
 
print(listing())

Also, don't use list as variable name. list() is built-in function and using list as a variable name the function is no longer available