讀取文件：

mport json

user_list = {
    ‘andy‘: "123456",
    ‘william‘:‘123456‘,
    ‘abc‘: "123456",
    ‘bcd‘:‘123456‘,
    ‘cde‘: ‘123456‘,
    ‘def‘: "123456",
    ‘efg‘: ‘123456‘,
    }

jsObj = json.dumps(user_list)
fileObject = open(‘jsonFile.json‘, ‘w‘)
fileObject.write(jsObj)
fileObject.close()

用戶登錄程序：

#Author:xiesongyou
import json
times = 0
login = False
while times < 3 and login == False: #用戶名錯可以輸入3次用戶名
    with open(‘login_3_times.json‘) as json_file:
        data = json.load(json_file)
    username=input("請輸入用戶名>>")
    if username in data:
        print("用戶已鎖定，請聯系管理員！")
        login = True
    else:
        fileObject = open(‘jsonFile.json‘)
        user_list = json.load(fileObject)
        if username in user_list:
            count = 0
            userpwd = input("請輸入密碼>>")
            while count<3:

                if userpwd == user_list[username]:
                    login = True
                    print("歡迎登陸...")
                    break
                count += 1
                if count < 3: #可以輸入3次密碼
                    userpwd = input("請重新輸入密碼>>")
                else:
                    with open(‘login_3_times.json‘) as json_file:
                        data = json.load(json_file)
                    data[username]="123456"

                    jsObj = json.dumps(data)
                    fileObject = open(‘login_3_times.json‘,"w")
                    fileObject.write(jsObj)
                    fileObject.close()
                    print("用戶已鎖定！")
        else:

            times += 1
            print("用戶名錯誤！%d 次"%times)

用戶登錄程序，讀取文件用戶名，鎖定寫入文件