三级菜单

这个三级菜单费了很长时间，写起来很吃力，在老师讲之前，思路都错了，使用了字典套字典然后再套字典的方式，所以获取最里层的元素就很困难，一直被困在这里。听了老师的课，按照老师的思路，主要是数据的存储结构，然后自己写了控制逻辑。本来打算放弃了，因为很多同学都看视频教程都看到后面去了，自己很着急。但是我还是坚持了下来，最终完成了这个三级菜单的功能。值得自豪一下，自己完成了，I got it。下面将我的代码附上来。

首先是func.py部分的代码：

#!/usr/bin/env python
#-*-coding:utf-8-*-
#Created on 2016-6-19下午9:49:56
#author: Administrator

#定义省份列表
def get_province_list():
    pro_list = (
                {'pid':'1','pname':'四川省'},
                {'pid':'2','pname':'云南省'},
                {'pid':'3','pname':'河北省'},
                {'pid':'4','pname':'山西省'},
                {'pid':'5','pname':'辽宁省'},
    )
    return pro_list


#定义城市列表函数
def get_city_list():
    city_list =(
                ({'cid':'1-1','cname':'成都市'},{'cid':'1-2','cname':'自贡市'},{'cid':'1-3','cname':'攀枝花市'},{'cid':'1-4','cname':'泸州市'},{'cid':'1-5','cname':'德阳市'},),
                ({'cid':'2-1','cname':'昆明市'},{'cid':'2-2','cname':'曲靖市'},{'cid':'2-3','cname':'玉溪市'},{'cid':'2-4','cname':'保山市'},{'cid':'2-5','cname':'昭通市'},),
                ({'cid':'3-1','cname':'石家庄市'},{'cid':'3-2','cname':'唐山市'},{'cid':'3-3','cname':'秦皇岛市'},{'cid':'3-4','cname':'邯郸市'},{'cid':'3-5','cname':'邢台市'},),
                ({'cid':'4-1','cname':'太原市'},{'cid':'4-2','cname':'大同市'},{'cid':'4-3','cname':'阳泉市'},{'cid':'4-4','cname':'长治市'},{'cid':'4-5','cname':'晋城市'},{'cid':'4-6','cname':'朔州市'},),
                ({'cid':'5-1','cname':'沈阳市'},{'cid':'5-2','cname':'大连市'},{'cid':'5-3','cname':'鞍山市'},{'cid':'5-4','cname':'抚顺市'},{'cid':'5-5','cname':'本溪市'},),
    )
    return city_list

#定义区域列表
def get_area_list():
    area_list = (
                ({'aid':'1-1-1','aname':'市辖区'},{'aid':'1-1-2','aname':'锦江区'},{'aid':'1-1-3','aname':'青羊区'},{'aid':'1-1-4','aname':'金牛区'},{'aid':'1-1-5','aname':'武侯区'}),
                ({'aid':'1-2-1','aname':'市辖区'},{'aid':'1-2-2','aname':'自流井区'},{'aid':'1-2-3','aname':'贡井区'},{'aid':'1-2-4','aname':'大安区'},{'aid':'1-2-5','aname':'沿滩区'}),
                ({'aid':'1-3-1','aname':'市辖区'},{'aid':'1-3-2','aname':'东区'},{'aid':'1-3-3','aname':'西区'},{'aid':'1-3-4','aname':'仁和区'},{'aid':'1-3-5','aname':'米易县'},{'aid':'1-3-6','aname':'盐边县'}),
                ({'aid':'1-4-1','aname':'市辖区'},{'aid':'1-4-2','aname':'江阳区'},{'aid':'1-4-3','aname':'纳溪区'},{'aid':'1-4-4','aname':'龙马潭区'}),
                ({'aid':'1-5-1','aname':'市辖区'},{'aid':'1-5-2','aname':'旌阳区'},{'aid':'1-5-3','aname':'中江县'},{'aid':'1-5-4','aname':'罗江县'}),
                ({'aid':'2-1-1','aname':'市辖区'},{'aid':'2-1-2','aname':'五华区'},{'aid':'2-1-3','aname':'盘龙区'},{'aid':'2-1-4','aname':'官渡区'},{'aid':'2-1-5','aname':'西山区'}),
                ({'aid':'2-2-1','aname':'市辖区'},{'aid':'2-2-2','aname':'麒麟区'},{'aid':'2-2-3','aname':'马龙区'},{'aid':'2-2-4','aname':'陆良区'},{'aid':'2-2-5','aname':'师宗区'}),
                ({'aid':'2-3-1','aname':'市辖区'},{'aid':'2-3-2','aname':'红塔区'},{'aid':'2-3-3','aname':'江川县'},{'aid':'2-3-4','aname':'澄江县'},{'aid':'2-3-5','aname':'通海县'}),
                ({'aid':'2-4-1','aname':'市辖区'},{'aid':'2-4-2','aname':'隆阳区'},{'aid':'2-4-3','aname':'施甸县'},{'aid':'2-4-4','aname':'腾冲县'},{'aid':'2-4-5','aname':'龙陵县'}),
                ({'aid':'2-5-1','aname':'市辖区'},{'aid':'2-5-2','aname':'昭阳区'},{'aid':'2-5-3','aname':'鲁甸县'},{'aid':'2-5-4','aname':'巧家县'},{'aid':'2-5-5','aname':'盐津县'}),
                ({'aid':'3-1-1','aname':'市辖区'},{'aid':'3-1-2','aname':'长安区'},{'aid':'3-1-3','aname':'桥东区'},{'aid':'3-1-4','aname':'桥西区'},{'aid':'3-1-5','aname':'新华区'}),
                ({'aid':'3-2-1','aname':'市辖区'},{'aid':'3-2-2','aname':'路南区'},{'aid':'3-2-3','aname':'路北区'},{'aid':'3-2-4','aname':'古冶区'},{'aid':'3-2-5','aname':'开平区'}),
                ({'aid':'3-3-1','aname':'市辖区'},{'aid':'3-3-2','aname':'海港区'},{'aid':'3-3-3','aname':'山海关区'},{'aid':'3-3-4','aname':'北戴河区'},{'aid':'3-3-5','aname':'昌黎县'}),
                ({'aid':'3-4-1','aname':'市辖区'},{'aid':'3-4-2','aname':'邯山区'},{'aid':'3-4-3','aname':'丛台区'},{'aid':'3-4-4','aname':'复兴区'},{'aid':'3-4-5','aname':'邯郸县'}),
                ({'aid':'3-5-1','aname':'市辖区'},{'aid':'3-5-2','aname':'桥东区'},{'aid':'3-5-3','aname':'桥西区'},{'aid':'3-5-4','aname':'邢台县'},{'aid':'3-5-5','aname':'临城县'}),
                ({'aid':'4-1-1','aname':'市辖区'},{'aid':'4-1-2','aname':'小店区'},{'aid':'4-1-3','aname':'迎泽区'},{'aid':'4-1-4','aname':'杏花岭区'},{'aid':'4-1-5','aname':'尖草坪区'}),
                ({'aid':'4-2-1','aname':'市辖区'},{'aid':'4-2-2','aname':'城区'},{'aid':'4-2-3','aname':'矿区'},{'aid':'4-2-4','aname':'南郊区'},{'aid':'4-2-5','aname':'新荣区'}),
                ({'aid':'4-3-1','aname':'市辖区'},{'aid':'4-3-2','aname':'城区'},{'aid':'4-3-3','aname':'矿区'},{'aid':'4-3-4','aname':'郊区'},{'aid':'4-3-5','aname':'平定县'}),
                ({'aid':'4-4-1','aname':'市辖区'},{'aid':'4-4-2','aname':'城区'},{'aid':'4-4-3','aname':'郊区'},{'aid':'4-4-4','aname':'长治县'},{'aid':'4-4-5','aname':'襄垣县'}),
                ({'aid':'4-5-1','aname':'市辖区'},{'aid':'4-5-2','aname':'城区'},{'aid':'4-5-3','aname':'沁水县'},{'aid':'4-5-4','aname':'阳城县'},{'aid':'4-5-5','aname':'陵川县'}),
                ({'aid':'4-6-1','aname':'市辖区'},{'aid':'4-6-2','aname':'朔城区'},{'aid':'4-6-3','aname':'平鲁区'},{'aid':'4-6-4','aname':'山阴县'},{'aid':'4-6-5','aname':'应县'}),
                ({'aid':'5-1-1','aname':'市辖区'},{'aid':'5-1-2','aname':'和平区'},{'aid':'5-1-3','aname':'沈河区'},{'aid':'5-1-4','aname':'大东区'},{'aid':'5-1-5','aname':'皇姑区'}),
                ({'aid':'5-2-1','aname':'市辖区'},{'aid':'5-2-2','aname':'中山区'},{'aid':'5-2-3','aname':'西岗区'},{'aid':'5-2-4','aname':'沙河口区'},{'aid':'5-2-5','aname':'甘井子区'}),
                ({'aid':'5-3-1','aname':'市辖区'},{'aid':'5-3-2','aname':'铁东区'},{'aid':'5-3-3','aname':'铁西区'},{'aid':'5-3-4','aname':'立山区'},{'aid':'5-3-5','aname':'千山区'}),
                ({'aid':'5-4-1','aname':'市辖区'},{'aid':'5-4-2','aname':'新抚区'},{'aid':'5-4-3','aname':'东洲区'},{'aid':'5-4-4','aname':'望花区'},{'aid':'5-4-5','aname':'顺城区'}),
                ({'aid':'5-5-1','aname':'市辖区'},{'aid':'5-5-2','aname':'平山区'},{'aid':'5-5-3','aname':'溪湖区'},{'aid':'5-5-4','aname':'明山区'},{'aid':'5-5-5','aname':'南芬区'}),
                 )
    return area_list

def show_pro():
    pro_list = get_province_list()
    for province in pro_list:         #province是元组中的一个字典，因此具有key和value
        print(province['pid'],province['pname'])
        
#判断选择的省份是否在已有省份中的函数
def is_choose_province_exsit(pid):            
    for pro_list in get_province_list():
        if pid == pro_list['pid']:
            return True
    return False

def is_choose_city_exsit(choose_pid,choose_cid):
    for city_list in get_city_list():
        for city in city_list:
            if choose_pid+'-'+ choose_cid == city['cid']:
                return True
    return False

#显示所选编号的省下对应的城市名称函数            
def show_city(choosed_pid):
    for city_list in get_city_list():                 #ciyt_list为子元组
        for city in city_list:                        #city为子元组里面的字典
            pid,cid = city['cid'].split('-')          #通过字符串的split()方法，将数据中的cid划分为省编号pid和城市编号cid
            if pid == choosed_pid:                    #加上判断条件，打印对应序号下的省包含的城市名称
                print(cid,city['cname'])

def show_area(choose_pid,choose_cid):
    for area_list in get_area_list():
        for area in area_list:
            pid,cid,aid = area['aid'].split('-')
            if pid == choose_pid and cid == choose_cid:
                print(aid,area['aname'])

接着上主程序部分代码：

#!/usr/bin/env python
#-*-coding:utf-8-*-
#Created on 2016-6-19下午7:37:31
#author: Administrator

from func import *

if __name__ == '__main__':
    pro_flag = True                       #定义一个标识，用于控制程序是否退出    
    while pro_flag:                       #开始无限循环，判断输入，直到后面程序设置循环标识为False，退出程序
        show_pro()
        choose_pid = input('请输入省份编号:').strip()
        if not choose_pid.isdigit():
            if choose_pid == 'exit':
                pro_flag = False
            else:
                print('输入错误，请重新输入.')
                continue
        if is_choose_province_exsit(choose_pid):
            city_flag = True
            while city_flag:
                show_city(choose_pid)
                choose_cid = input('请输入城市编号:').strip()
                if not choose_cid.isdigit():       #判断用户输入是否为数字，如果不为数字，看是否为quit或者exit中的一个，根据用户输入不同，进行不同操作
                    if choose_cid == 'quit':
                        break
                    elif choose_cid == 'exit':
                        pro_flag = False
                        break
                    else:
                        print('输入错误，请重新输入.')
                        continue
                while is_choose_city_exsit(choose_pid,choose_cid):
                    show_area(choose_pid, choose_cid)
                    choose =input('返回上一级请输入"quit"，直接退出请输入"exit"').strip()
                    if choose == 'quit':
                        break
                    elif choose == 'exit':
                        city_flag = False
                        pro_flag = False
                        break
                    else:
                        print('输入错误，请重新输入:')
                else:
                    print('输入错误，请重新输入:')
                    continue
        else:
            print('输入错误,请重新输入.')      

程序功能是实现了，但是与老师的代码比较起来，繁琐，不够简洁，效率肯定更加低下，还需要好好努力，多写，多看，多思考，一定会提高的。为自己加油！