本文實(shí)例講述了Python3.5實(shí)現(xiàn)的三級(jí)菜單功能。分享給大家供大家參考，具體如下：

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程序：三級(jí)菜單

要求：

     1. 打印省、市、縣三級(jí)菜單
     2. 可返回上一級(jí)
     3. 可隨時(shí)退出程序

具體代碼：

#!/usr/bin/env python
# -*- coding:utf-8 -*-
# Author:ZhengzhengLiu
Province_Data = {
  "北京市":{
    "朝陽(yáng)區(qū)":{
      "南磨房地區(qū)":["東郊社區(qū)","平樂園社區(qū)"],
      "高碑店地區(qū)":["興隆家園社區(qū)","大黃莊社區(qū)"],
      "將臺(tái)地區(qū)":["麗都社區(qū)","房里苑社區(qū)"]
    },
    "海淀區(qū)":{
      "萬(wàn)壽路街道":["",""],
      "羊坊店街道":["",""],
      "八里莊街道":["",""]
    },
    "懷柔區(qū)":{
      "懷柔鎮(zhèn)":["",""],
      "雁棲鎮(zhèn)":["",""],
      "城廟鎮(zhèn)":["",""]
    }
  },
  "天津市":{
    "和平區(qū)":{
      "勸業(yè)場(chǎng)街道":["",""],
      "小白樓街道":["",""],
      "五大道街道":["",""]
    },
    "南開區(qū)":{
      "華苑街道":["",""],
      "長(zhǎng)虹街道":["",""],
      "鼓樓街道":["",""]
    },
    "河西區(qū)":{
      "桃園街道":["",""],
      "馬場(chǎng)街道":["",""],
      "大營(yíng)門街道":["",""]
    }
  },
  "河北省":{
    "石家莊市":{
      "長(zhǎng)安區(qū)":["",""],
      "橋西區(qū)":["",""],
      "新華區(qū)":["",""]
    },
    "廊坊市":{
      "安次區(qū)":["",""],
      "廣陽(yáng)區(qū)":["",""],
      "西小區(qū)":["",""]
    },
    "唐山市":{
      "路南區(qū)":["",""],
      "路北區(qū)":["",""],
      "古冶區(qū)":["",""]
    }
  },
  "山東省":{
    "青島市":{
      "市南區(qū)":["",""],
      "市北區(qū)":["",""],
      "即墨市":["",""]
    },
    "濟(jì)南市":{
      "歷下區(qū)":["",""],
      "市中區(qū)":["",""],
      "槐蔭區(qū)":["",""]
    },
    "煙臺(tái)市":{
      "福山區(qū)":["",""],
      "萊山區(qū)":["",""],
      "牟平區(qū)":["",""]
    }
  }
}
exit_flag = False  #退出標(biāo)志符
while not exit_flag:
  for i in Province_Data:
    print(i)
  user_choice = input("Please choose the province...")
  if user_choice in Province_Data:
    while not exit_flag:
      for j in Province_Data[user_choice]:
        print('\t',j)
      user_choice1 = input("Please choose the city...")
      if user_choice1 in Province_Data[user_choice]:
        while not exit_flag:
          for k in Province_Data[user_choice][user_choice1]:
            print('\t\t',k)
          user_choice2 = input("Please choose the communitiy...")
          if user_choice2 in Province_Data[user_choice][user_choice1]:
            while not exit_flag:
              for l in Province_Data[user_choice][user_choice1][user_choice2]:
                print('\t\t\t',l)
              user_choice3 = input("The last choose,please enter 'b' to back...")
              if user_choice3 == 'b':
                break
              elif user_choice3 == 'q':
                exit_flag = True
          if user_choice2 == 'b':
            break
          elif user_choice2 == 'q':
            exit_flag = True
      if user_choice1 == 'b':
        break
      elif user_choice1 == 'q':
        exit_flag = True
#運(yùn)行結(jié)果：
'''
山東省
河北省
天津市
北京市
Please choose the province...北京市
 朝陽(yáng)區(qū)
 懷柔區(qū)
 海淀區(qū)
Please choose the city...朝陽(yáng)區(qū)
  南磨房地區(qū)
  將臺(tái)地區(qū)
  高碑店地區(qū)
Please choose the communitiy...將臺(tái)地區(qū)
  麗都社區(qū)
  房里苑社區(qū)
The last choose,please enter 'b' to back...b
  南磨房地區(qū)
  將臺(tái)地區(qū)
  高碑店地區(qū)
Please choose the communitiy...b
 朝陽(yáng)區(qū)
 懷柔區(qū)
 海淀區(qū)
Please choose the city...b
山東省
河北省
天津市
北京市
Please choose the province...北京市
 朝陽(yáng)區(qū)
 懷柔區(qū)
 海淀區(qū)
Please choose the city...q
Process finished with exit code 0
'''

文章題目：Python3.5實(shí)現(xiàn)的三級(jí)菜單功能示例-創(chuàng)新互聯(lián)
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