Python 模块的参数可以用字典么？哪位大神看看我的代码哪里有问题，报错信息也在的

[mygzhh]

需要实现的功能是：
三级菜单
1.从文本内读出选项
2.查询每一级的选项，并能对选项进行增/删/改功能
3.每一级可以退出程序或者返回上一层

思路

三个操作模块，分别是 增/删/改 功能
三个查询模块，分别对每一级别进行查询

报错信息：
Traceback (most recent call last):
File "E:/python/day8/three menu.py", line 79, in <module>
shen()
File "E:/python/day8/three menu.py", line 37, in shen
elif city == 'a':FileAppend(menu)
File "E:/python/day8/three menu.py", line 17, in FileAppend
ExChange()
File "E:/python/day8/three menu.py", line 47, in ExChange
FileWrite.write(menu)
TypeError: expected a string or other character buffer object

# -*- coding: UTF-8 -*-
#__filename:three menu
#__time:2018/5/13 22:04

import io
import os

FileRead = io.open('city','r',encoding='utf8')
FileWrite= open('city_backup','w+')
menu = eval(FileRead.read())

def FileAppend(MenuAppend):

    CityAppend = raw_input("请输入添加的城市",)
    MenuAppend['CityAppend']={}
    ExChange()

def FileDel(MenuDel):
    CityDel = raw_input("请输入你要删除的城市",)
    MenuDel.pop('CityDel')
    ExChange()

def FileChance(MenuChance):
    CityChance = raw_input("请输入被替换的城市",)
    if CityChance in MenuChance : CityChanced = raw_input("请输入替换的城市",)
    MenuChance['CityChanced'] = MenuChance['CityChance']
    MenuChance.pop('CityChance')
    ExChange()

def shen():
    for i in menu:print (i)
    city = raw_input('请输入你选择的省份',)
    if city == 'q': exit()
    elif city == 'd':FileDel(menu)
    elif city == 'c':FileChance(menu)
    elif city == 'a':FileAppend(menu)
    elif (city in menu) and (menu[city]!=0): shi(city)
    elif menu[city]==0 :
        print "该省下面没有市，请添加"
        FileAppend(menu[city])
    else:
        print '请输入正确的省份'
        shen()

def ExChange():
    FileWrite.write(menu)
    FileRead.close()
    FileWrite.close()
    os.remove('FileRead')
    os.renames('FileWrite','FileRead')

def shi(city):
    for i in menu[city]: print (i)
    city1 = raw_input('请输入你选择的市或退出程序(Q)或返回上一级菜单(B)').strip()
    if city1 == 'b':shen()
    elif city1 == 'q':exit()
    elif city1 == 'd':FileDel(menu[city])
    elif city1 == 'c':FileChance(menu[city])
    elif city1 == 'a':FileAppend(menu[city])
    elif (city1 in menu[city])and (menu[city][city1]!=0):xian(city,city1)
    elif menu[city][city1]==0 : FileAppend( menu[city][city1])
    else:
        '请输入正确的市'
        shi(city)

def xian(city,city1):
    for i in menu[city][city1]: print (i)
    city2 = raw_input('请选择退出(Q)或返回(B) ')
    if city2 == 'b': shi(city)
    elif city2 == 'q': exit()
    elif city2 == 'd':FileDel(menu[city][city1])
    elif city2 == 'c':FileChance(menu[city][city1])
    elif city2 == 'a':FileAppend(menu[city][city1])
    else:
        '请输入正确的区或县'
        xian(city, city1)

shen()

[半吊子Py全栈工程师]

def ExChange(): FileWrite.write(menu) FileRead.close() FileWrite.close() os.remove('FileRead') os.renames('FileWrite','FileRead') 这个加一行，应该是menu类型错误了,然后你在改吧 def ExChange(): print(type(menu)) FileWrite.write(menu)

[mygzhh]

引用 1 楼 qq_26877377 的回复:

def ExChange(): FileWrite.write(menu) FileRead.close() FileWrite.close() os.remove('FileRead') os.renames('FileWrite','FileRead') 这个加一行，应该是menu类型错误了,然后你在改吧 def ExChange(): print(type(menu)) FileWrite.write(menu)

哈哈 懂了 menu的类型是字典，写入文件的应该要是字符串或，谢谢大佬