rank vote view answer url 20 3116 2973556 20 url Python中的appen和extend append和extend有什么区别? append: x = [1, 2, 3] x.append([4, 5]) print (x) 输出:[1, 2, 3, [4, 5]] extend: x = [1, 2, 3] x.extend([4, 5]) print (x) 输出:[1, 2, 3, 4, 5]