python-序列解包(对可迭代元素的快速取值方法)
一般情况下
x,y,z=1,2,3
print("x:",x)
print("y:",y)
print("z:",z)
#运行结果 x:1 y:2 z:3
对元祖序列解包
name=("qiaobushi","wanglihong","leibushi")
x,y,z=name
print(name)
print("x:",x)
print("y:",y)
print("z:",z)
#运行结果
('qiaobushi','wanglihong','leibushi')
x:qiaobushi
y:wanglihong
z:leibushi
对列表序列解包
str="123,456,789"
str=str.split(",")
print(str)
x,y,z=str
print("x:",x)
print("y:",y)
print("z:",z)
#运行结果 ['123','456','789'] x:123 y:456 z:789
对dict序列解包获得key和value
#例1
dict1={"one":1,"two":2,"three":3}
x,y,z=dict1
print("key-x:",x)
print("key-y:",y)
print("key-z:",z)
print("value-x:",dict1[x])
print("value-y:",dict1[y])
print("value-z:",dict1[z])
#例2
dict1={"one":1}
x,y=dict1.popitem()
print("key:",x,"value:",y)
#运行结果 key-x:one key-y:two key-z:three value-x:1 value-y:2 value-z:3 key:onevalue:1
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