pancake sort

 1def flip(arr, k):
 2  arr[:k+1] = reversed(arr[:k+1])
 3
 4def pancake_sort(arr):
 5  for i in reversed(range(len(arr))):
 6    m = max(arr[:i+1])
 7    mi = arr.index(m)
 8    flip(arr, mi)
 9    flip(arr, i)
10
11arr = [1, 5, 4, 3, 2]
12pancake_sort(arr)
13
14print(arr)