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: one value: 1



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