Python列表追加

1、extend()

a = [1,2]
b = [3,4]
a.extend(b)
print(a) # [1, 2, 3, 4]

a = [1,2]
b=3
c=4
a.extend((b,c))
print(a) # [1, 2, 3, 4]

2、a+b

a = [1,2]
b = [3,4]

print(a+b) # [1, 2, 3, 4]