Python制作一个“密码薄”，其可以存储一个网址和一个密码。

# 密码薄
passwordBook = {}
def add(password, value):
    if password not in passwordBook.keys():
        passwordBook[password] = value
        save()
    else:
        print("该密码已存在")
def delete(password):
    if password in passwordBook.keys():
        del passwordBook[password]
        print(passwordBook)
        save()
    else:
        print("该密码不存在")
def modify(password, newValue):
    if password in passwordBook.keys():
        passwordBook[password] = newValue
        print(passwordBook)
        save()
    else:
        print("该密码不存在")
def find(value):
    if value in passwordBook.values():
        print("该网址存在")
    else:
        print("该网址不存在")
def save():
    f = open("password.txt","w")
    f.write(str(passwordBook))
    f.close()
def printInfo():
    print("密码簿的功能如下：")
    print("1.添加")
    print("2.删除")
    print("3.修改")
    print("4.查找")
i = 0
while i<5:
    printInfo()
    num = int(input("请输入要选择的功能："))
    if num==1:
        web = input("请输入存入的网址：")
        password1 = input("请输入密码：")
        add(password1, web)
        print(passwordBook)
    elif num==2:
        password2 = input("请输入密码：")
        delete(password2)
    elif num==3:
        password3 = input("请输入密码：")
        value3 = input("请输入新的网址：")
        modify(password3,value3)
    elif num==4:
        value4 = input("请输入要查找的网址：")
        find(value4)
    i+=1