1.拆包、交换变量的值
<1> 对返回的数据直接拆包
def get_my_info():
high = 178
weight = 100
age = 18
return high, weight, age
# result = get_my_info()
# print(result)
my_high, my_weight, my_age = get_my_info()
print(my_high)
print(my_weight)
print(my_age)
总结：
- 拆包时要注意，需要拆的数据的个数要与变量的个数相同，否则程序会异常
- 除了对元组拆包之外，还可以对列表、字典等拆包
In [17]: a, b = (11, 22)
In [18]: a
Out[18]: 11
In [19]: b
Out[19]: 22
In [20]: a, b = [11, 22]
In [21]: a
Out[21]: 11
In [22]: b
Out[22]: 22
In [23]: a, b = {"m":11, "n":22} # 取出来的是key，而不是键值对
In [24]: a
Out[24]: 'm'
In [25]: b
Out[25]: 'n'
<2> 交换2个变量的值
# 第1种方式
# a = 4
# b = 5
# c = 0
#
# c = a
# a = b
# b = c
#
# print(a)
# print(b)
# 第2种方式
# a = 4
# b = 5
# a = a+b # a=9, b=5
# b = a-b # a=9, b=4
# a = a-b # a=5, b=4
# print(a)
# print(b)
# 第3种方式
a, b = 4, 5
a, b = b, a
print(a)
print(b)
