排序算法-选择排序

def select_sort(arr):
    for i in range(len(arr)):
        min_index = i
        for j in range(j+1, len(arr)):
            if arr[i] < arr[j]:
                min_index = j

        if min_index != i:
            arr[i], arr[min_index] = arr[min_index], arr[i]