def pop_sort(lst):
    for i in range(len(lst)-1, 0, -1):
        move_max(lst, i)


def move_max(lst, max_index):
    for i in range(max_index):
        if lst[i] > lst[i+1]:
            lst[i], lst[i+1] = lst[i+1], lst[i]

if __name__ == '__main__':
    lst = [4, 1, 7, 2, 3, 6]
    # pop_sort(lst)
    # print(lst)
    for j in range(len(lst) - 1, 0, -1):
        for i in j:
            if lst[i] > lst[i+1]:
                lst[i], lst[i+1] = lst[i+1], lst[i]