what does sort do in python code example

Example 1: sort in python'

arr = [1,4,2,7,5,6]
#sort in ascending order
arr = arr.sort() 

#sort in descending order
arr = arr.sort(reverse = True)

Example 2: sorting python array

sorted(list, key=..., reverse=...)

Example 3: how to sort a list in python

old_list = [3,2,1]
old_list.sort()

Example 4: sorting in python

python list sort()