列表中的最小交换元素，以使其与另一个列表相同，并计算python中的交换

def min_swaps(list1, list2):
    if len(list1) != len(list2):
        return -1
    
    swaps = 0
    index_dict = {}
    
    for i in range(len(list1)):
        index_dict[list1[i]] = i
    
    for i in range(len(list2)):
        if list2[i] != list1[i]:
            if list2[i] in index_dict:
                list1[i], list1[index_dict[list2[i]]] = list1[index_dict[list2[i]]], list1[i]
                swaps += 1
            else:
                return -1
    
    return swaps

list1 = [1, 2, 3, 4]
list2 = [2, 1, 4, 3]
min_swaps_count = min_swaps(list1, list2)
print("最小交换次数：", min_swaps_count)