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)