# -*- codeing = utf-8 -*-
# @Time : 2020/9/30 20:15
# @Author : zhaha
# @File : try1.py
# @Software : PyCharm


areas = {"北京": "010", "上海": "020", "广州": "050020", "深圳": "050090", "天津": "030", "苏州": "060080", "重庆": "040", "南京": "060020", "杭州": "070020", "大连": "210040", "成都": "280020", "武汉": "170020"}
print(len(areas.keys()))
print(areas.keys())
for item in areas.keys():
    print(item)