如何确定两个数据列表中的差异

list1 = [1, 2, 3, 4, 5]
list2 = [3, 4, 5, 6, 7]

# 方法1：排序
list1.sort()
list2.sort()
diff1 = []
i = j = 0
while i < len(list1) and j < len(list2):
    if list1[i]< list2[j]:
        diff1.append(list1[i])
        i += 1
    elif list1[i] > list2[j]:
        diff1.append(list2[j])
        j += 1
    else:
        i += 1
        j += 1

# 方法2：哈希表
hash_table = {}
for item in list1:
    hash_table[item] = True

diff2 = []
for item in list2:
    if item not in hash_table:
        diff2.append(item)

# 方法3：集合
set1 = set(list1)
set2 = set(list2)
diff3 = list(set1.symmetric_difference(set2))

print("差异元素：", diff1 + diff2 + diff3)