Python_JSON_存储数据

最新推荐文章于 2024-07-29 02:30:44 发布

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本文介绍如何利用Python中的json模块实现用户姓名的存储与读取功能。通过定义函数get_stored_username(), get_new_name(), 和get_user()来处理用户名的加载与输入流程，并演示了如何使用json.dump()和json.load()来写入与读取文件。

1. json.dump()和json.load

# _*_ coding:utf8 _*_
import json


# 记住用户名

# try:
#     with open('username.json') as username_obj:
#         username = json.load(username_obj)
#         print(username)
# except FileNotFoundError:
#     username = input(" please input your name")
#     with open('username.json', 'w') as username_obj:
#         json.dump(username, username_obj)
#         print(" we will remember your name is " + username)
# else:
#     print(" welcome " + username)
#
#

def get_stored_username():
    try:
        with open('my_name.json') as my_object:
            username = json.load(my_object)
    except:
        return None
    else:
        return username


def get_new_name():
    # 输入用户名
    username = input('please input your name')
    with open('my_name.json', 'w') as my_object:
        json.dump(username, my_object)
    return username


def get_user():
    username = get_stored_username()
    if username:
        print(" welcome " + username)
    else:
        username = get_new_name()
        print(" new name is " + username)


# 调用下函数
get_user()