序列解包：列表拆包、元组拆包、字典拆包

lst = list("abc")
t1, t2, t3 = lst # 列表拆包
print(t1) # a
print(t2) # b
print(t3) # c

t1 = ("A", "B", "C")
a, b, c = t1 # 元组拆包
print(a) # A
print(b) # B
print(c) # C

d1 = {x: x ** 2 for x in (1, 2, 3)}
x, y, z = d1 # 字典拆包，取出来的事字典的key
print(x) # 1
print(y) # 2
print(z) # 3