赋值与解包

# python3.6.8

x, y = (1, 2)
print(x, y)  # 1 2

x, y = (1, 2, 3)
print(x, y)  # ValueError: too many values to unpack (expected 2)

x, *y = (1, 2, 3)
print(x, y)  # 1 [2, 3]

x, *y, z = (1, 2, 3, 4)
print(x, y, z)  # 1 [2, 3] 4