python列表取差集

以下是两种Python列表取差集的方法：

1.使用set()函数

a = [1, 2, 3, 4, 5]
b = [3, 4, 5, 6, 7]
diff = list(set(a).difference(set(b)))
print(diff) # 输出：[1, 2]

2.使用列表推导式

a = [1, 2, 3, 4, 5]
b = [3, 4, 5, 6, 7]
diff = [i for i in a if i not in b]
print(diff) # 输出：[1, 2]