第二十二天- 序列化 pickle json shelve

 1 import pickle
 2 
 3 
 4 class User:
 5     def __init__(self,username,password):
 6         self.username = username
 7         self.password = password
 8 
 9 
10 class Client:
11     # 注册
12     def regist(self):
13         uname = input("请输入你的账户：")
14         pwd = input("请输入你的密码：")
15         user = User(uname,pwd)  # 把uname pwd 传参到User类
16         pickle.dump(user,open("userinfo",mode='ab'))  # 把对象保存到userinfo
17         print("注册成功！")
18 
19     # 登录
20     def login(self):
21         uname = input("请输入你的账户：")
22         pwd = input("请输入你的密码：")
23         f = open('userinfo',mode='rb')  
24         while 1:
25             # 加入try except 当不存在的账户登录时 抛出错误
26             try:
27                 u = pickle.load(f)  # 从userinfo中读取出用户 
28                 if u.username == uname and u.password == pwd:
29                     print("登陆成功！")
30                     break
31             except Exception as e:
32                 print("登录失败！")
33                 break
34 
35 d = Client()
36 # print("注册")
37 # d.regist()
38 # d.regist()
39 # d.regist()
40 # print("登录")
41 # d.login()
42 # d.login()
43 # d.login()

 1 class Person:
 2     def __init__(self,firstName,lastName):
 3         self.firstName = firstName
 4         self.lastName = lastName
 5 
 6 p = Person('尼古拉斯','赵四')
 7 
 8 # 方案一 转化的是字典
 9 s = json.dumps(p.__dict__,ensure_ascii=False)
10 print(s)  # {"firstName": "尼古拉斯", "lastName": "赵四"}
11 
12 # 方案二 自己定义函数
13 def func(obj):
14     return {
15         'firstName':obj.firstName,
16         'lastName':obj.lastName
17     }
18 
19 s = json.dumps(p,default=func,ensure_ascii=False)
20 print(s)  # {"firstName": "尼古拉斯", "lastName": "赵四"}

 1 import json
 2 lst = [{'a':1},{'b':2},{'c':3}]
 3 f = open('test.json',mode='w',encoding='utf-8')
 4 for el in lst:
 5     json.dump(el,f)
 6 f.close()
 7 # 若需要读取改用 dumps和loads  循环对每行分别处理
 8 import json
 9 lst = [{"a": 1}, {"b": 2}, {"c": 3}]
10 # 写?
11 f = open("test.json", mode="w", encoding="utf-8")
12 for el in lst:
13     s = json.dumps(el, ensure_ascii=True) + "\n"  # 注意dumps这里ensure_ascii是True
14     f.write(s)
15 f.close()
16 # 读取
17 f = open("test.json", mode="r", encoding="utf-8")
18 for line in f:
19     dic = json.loads(line.strip())
20     print(dic)
21 f.close()

 1 import configparser
 2 
 3 config = configparser.ConfigParser()
 4 config['DEFAULT'] = {
 5 "sleep": 1000,
 6  "session-time-out": 30,
 7  "user-alive": 999999
 8 }
 9 config['TEST-DB'] = {
10  "db_ip": "192.168.17.189",
11  "port": "3306",
12  "u_name": "root",
13  "u_pwd": "123456"
14 }
15 config['168-DB'] = {
16  "db_ip": "152.163.18.168",
17  "port": "3306",
18  "u_name": "root",
19  "u_pwd": "123456"
20 }
21 config['173-DB'] = {
22  "db_ip": "152.163.18.173",
23  "port": "3306",
24  "u_name": "root",
25  "u_pwd": "123456"
26 }
27 f = open("db.ini", mode="w")
28 config.write(f) # 写??件
29 f.flush()
30 f.close()

 1 config = configparser.ConfigParser()
 2 config.read("db.ini") # 读取?件
 3 print(config.sections()) # 获取到section. 章节...DEFAULT是给每个章节都配备的信息
 4 print(config.get("DEFAULT", "SESSION-TIME-OUT")) # 从xxx章节中读取到xxx信息
 5 # 也可以像字典?样操作
 6 print(config["TEST-DB"]['DB_IP'])
 7 print(config["173-DB"]["db_ip"])
 8 for k in config['168-DB']:
 9  print(k)
10 for k, v in config["168-DB"].items():
11  print(k, v)
12 print(config.options('168-DB')) # 同for循环,找到'168-DB'下所有键
13 print(config.items('168-DB')) #找到'168-DB'下所有键值对
14 print(config.get('168-DB','db_ip')) # 152.163.18.168 get?法Section下的key对应的value

 1 config = configparser.ConfigParser()
 2 config.read("db.ini") # 读取?件
 3 # 添加?个章节
 4 # config.add_section("189-DB")
 5 # config["189-DB"] = {
 6 # "db_ip": "167.76.22.189",
 7 # "port": "3306",
 8 # "u_name": "root",
 9 # "u_pwd": "123456"
10 # }
11 # 修改信息
12 config.set("168-DB", "db_ip", "10.10.10.168")
13 # 删除章节
14 config.remove_section("173-DB")
15 # 删除元素信息
16 config.remove_option("168-DB", "u_name")
17 # 写回?件
18 config.write(open("db.ini", mode="w"))