python笔记-dict字典的方法

#!/usr/bin/env python

#-*- coding:utf-8 -*-

#打印0001-9999的数字

for i in range(9999):

    s = "%04d" % i

    print(s)

#循环打印字典

dict1 = {"tom":90,"dgg":100,"sb":-1}

for a in dict1:

    print(a,dict1[a])

#打印dict1的值

for value in dict1.values():

    print(value)

#dict1.items  返回的是一个完整的列表

print(dict1.items())

#k与v分别对应的是key和value

for k,v in dict1.items():

    print(k,v)

#enumerate  显示字典key的下标

for i,v2 in enumerate(dict1):

    print(i,v2)