13 - 如何让两个列表首尾相接

# 1. '+'
a = [1, 3, 5, 6, 7]
b = [2, 3, 3, 6, 8]

print(a + b)

# 2. extend
a.extend(b)
print(a)

[1, 3, 5, 6, 7, 2, 3, 3, 6, 8]

[1, 3, 5, 6, 7, 2, 3, 3, 6, 8]

# 元组：'+'
# 元组本身是只读的，没有extend方法
c = (1, 2, 3)
d = (2, 3, 3, 4)

print(c + d)

(1, 2, 3, 2, 3, 3, 4)

a.extend(c)
print(a)

# print(a + c)

[1, 3, 5, 6, 7, 2, 3, 3, 6, 8, 1, 2, 3]