字典三级菜单之逐级添加内容

• 2020 年 1 月 19 日
• 笔记

1.单次增加一级节点

db = {    }  v = input(">>>")  db[v] = {}  print(db)

2.无限循环的来增加一级节点

db = {    }  while True:      v = input(">>>")      db[v] = {}      print(db)

3.完善

db = {      "上海": {},      "北京":{          "昌平":{              "沙河":{},              "回龙观":{},          },          "朝阳":{},          "海淀":{},      }  }  path = []  while True:      temp = db      for item in path:          temp = temp[item]      print("当前可选的所有子节点：", list(temp.keys()))        choice = input('1:添加节点；2：查看节点（b/q)；n >>>')      if choice == "1":          name = input("请输入要添加的节点名称：")          temp[name] = {}      elif choice == "2":          name = input("请输入要查看的节点名称：")          path.append(name)      elif choice.lower() == "b":          if path:                 #if path == True:              path.pop()      elif choice.lower() == "q":          print(temp)          #输出当前字典后再退出          break      else:          print("输入错误，请重新输入！")