模块之序列化,pickle模块,shelve模块,json模块,configparser模块

#pickle 模块
import pickle

#  dumps 序列化。 把对象转化成bytes
#  loads 反序列化。 把bytes转化成对象
#  dump 序列化。 把对象转化成bytes并写入文件
#  load 反序列化。把文件中的bytes读取。转化成对象

class Cat:
    def __init__(self, name, age):
        self.name = name
        self.age = age

    def catchMouse(self):
        print(self.name, self.age, "抓老鼠")


c = Cat("jerry", 18)
c.catchMouse()


# dumps 把对象转化成bytes  序列化
bs = pickle.dumps(c)
print(bs)

# 把bytes 转换回对象  反序列化
ccc = pickle.loads(bs)
ccc.catchMouse()

dic = {"jay": "周杰伦", "jj": "大阳哥"}
bs = pickle.dumps(dic)
print(bs)

d = pickle.loads(bs)
print(d)

c = Cat("jerry", 18)
f = open("pickle-test", mode="wb")
pickle.dump(c, f) # 结果人是看不了的。

f.close()
f = open("pickle-test", mode="rb")
c = pickle.load(f)
c.catchMouse()

lst = [Cat("猫1", 10), Cat("猫2", 9), Cat("猫3", 9), Cat("猫4", 9), Cat("猫5", 9)]

f = open("pickle-test", mode="wb")
pickle.dump(lst, f)
# for el in lst:
#     pickle.dump(el, f)

f.flush()
f.close()

f = open("pickle-test", mode="rb")
while 1:
    try:
        c1 = pickle.load(f)
        c1.catchMouse()
    except EOFError:
        break

#shelve模块
import shelve

# 打开一个文件
f = shelve.open("大阳哥", writeback=True)
f['jj'] = "林俊杰"
f['dyg'] = "大阳哥"
f['zzr'] = "周芷若"

f = {}
# 像操作字典一样操作文件
f["jay"] = "周杰伦"
print(f['jay'])

f["jay"] = {'name': "周杰伦", 'age': 38, "hobby": "吃喝拉撒睡"}

f['jay']['name'] = "胡辣汤"
print(f['jay']['name'])
print(f['jay'])


f.close()

f = shelve.open("大阳哥")
print(f.keys())
for k in f.keys(): # 可以获取到所有的key
    print(k)

for k in f:
    print(k)

for k, v in f.items():
    print(k, v)

#json模块
wf = {
    "name": "汪峰",
    "age": 18,
    "hobby": "抢头条",
    "wife": {
        "name": "子怡",
        "age": 19,
        "hobby":["唱歌", "跳舞", "演戏"]
    }
}

#wf['wife']['hobby']
class Person:
    def __init__(self, name, age, hobby, wife):
        self.name = name

import json
dic = {"a": '理查德姑妈', "b": "找到你", "c": "看不见的客人"}

# s = json.dumps(dic) # 如果你的key或者value超出了ascii范畴。 就会显示成uxxxxx
s = json.dumps(dic, ensure_ascii=False) # 干掉ascii码
print(repr(s), type(s))

#
# 把字符串解析成 字典
dic1 = json.loads(s)
print(dic1, type(dic1))

# 写入
f = open("waimai.json", mode="w", encoding="utf-8")
json.dump(dic, f, ensure_ascii=False)   # 把json写入到文件中
f.close()
#
# # 读出
f = open("waimai.json", mode="r", encoding="utf-8")
s = json.load(f) # 把文件中的json串。读取成字典
print(s, type(s))

lst = [{"a": "胡辣汤"},{"b":"吱吱冒油的大猪蹄子"},{"c": "盖浇饭"},{"d":"马拉"},{"e":"法国大蜗牛"}]
f = open("menu.json", mode="w", encoding="utf-8")
for dic in lst:
    json.dump(dic, f, ensure_ascii=False)
f.close()

f = open("menu.json", mode="r", encoding="utf-8")
s = json.load(f)
print(s)

# 写入的时候
# 1. 循环
# 2. 用dumps把字典转化成字符串， 然后手工在后面加一个

# 3. 写出
f = open("new_menu.json", mode="w", encoding="utf-8")
lst = [{"a": "胡辣汤"},{"b":"吱吱冒油的大猪蹄子"},{"c": "盖浇饭"},{"d":"马拉"},{"e":"法国大蜗牛"}]
for el in lst:
    s = json.dumps(el, ensure_ascii=False) + "
"
    f.write(s)

f.flush()
f.close()


# 读取的时候
# 1. for line in f:
# 2. strip()去掉空白
# 3. loads()变成字典

# f = open("new_menu.json", mode="r", encoding="utf-8")
# for line in f:
#     line = line.strip()
#     dic = json.loads(line)
#     print(dic)

#configparser模块
import configparser

conf = configparser.ConfigParser()
conf["DEFAULT"] = {
    "session-time-out":30,
    "user-alive": 60,
    "connect-alive":10
}

conf["189-DB"] = {
    "ip": "189.135.63.12",
    "port": 3306,
    "uname": "root",
    "password": "root"
}


conf["166-DB"] = {
    "ip": "189.135.63.12",
    "port": 3306,
    "uname": "root",
    "password": "root"
}


conf["163-DB"] = {
    "ip": "189.135.63.12",
    "port": 3306,
    "uname": "root",
    "password": "root"
}

f = open("db.ini", mode="w")
conf.write(f) # 把文件扔进去。 写到这个文件里


# 读取内容
conf = configparser.ConfigParser()
conf.read("db.ini")
print(conf.sections()) # 获取到章节 keys()
print(conf['166-DB']["ip"])  # 可以像字典一样操作
print(conf["166-DB"]["port"])
print(conf["166-DB"]["uname"])
print(conf["166-DB"]["password"])

for key in conf['163-DB']:
    print(key)

for key, value in conf['163-DB'].items():
    print(key, value)


# 增删改操作
conf = configparser.ConfigParser()
conf.read("db.ini") # 读取出来

conf['163-DB']['uname'] = "alex"
# del conf['163-DB']["password"]
conf.set("163-DB", "wangermazi", "189") # setattr

conf.add_section("jay")
conf.write(open("db.ini", mode="w"))