python zip

1，zip可视为对应位置打包

list1 = [1,2,3,4]
list2 = [5,6,7,8]
a = list(zip(list1,list2))
# 不把a转成list 生成的为<zip at 0x1ace257e688>

zip.png

2，用于迭代

list1 = [1,2,3,4]
list2 = [5,6,7,8]

for (x,y) in zip(list1,list2):
    print (x,'+',y, "=",x+y)

迭代

3，用于生成字典

k = ["a","b","c"]
v = ["1","2","3"]
dic = dict(zip(k,v))

生成字典.png

4，字典key,value互换

k = ["a","b","c"]
v = ["1","2","3"]
dic = dict(zip(k,v))

key = dic.keys()
value = dic.values()
new_dict = dict(zip(value,key))

互换key键.png