import pickle # #1、从文件中读取pickle格式 with open('egon.json','rb') as f:     pkl=f.read() #2、将json_str转成内存中的数据类型 dic=pickle.loads(pkl) print(dic['a']) #1和2可以合作一步 with open('db.pkl','rb') as f:     dic=pickle.load(f) print(dic['a']) # pickle 的序列化 import json,pickle s={1,2,3} # json.dumps(s) pickle.dumps(s) import pickle dic={'a':1,'b':2,'c':3} # 1 序列化 pkl=pickle.dumps(dic)  # 字典序列化后变成字节，不是字符串 print(pkl,type(pkl)) # #2 写入文件 with open('db.pkl','wb') as f:  # 对应的写入文件就应该是wb模式写入     f.write(pkl) # 1和2可以合作一步 with open('db.pkl','wb') as f:     pickle.dump(dic,f)

# json格式不能识别单引号，全都是双引号 import json with open('db1.json','rt',encoding='utf-8') as f:     json.load(f) json.loads('{"name":"egon"}') import json print(json.loads("{'name':'egon'}"))  #会报错，json文件里不存在单引号。反序列化对象里面不能有单引号 with open('db.json','wt',encoding='utf-8') as f:     l=[1,True,None]     json.dump(l,f) # 用json反序列化 with open('db.json','rt',encoding='utf-8') as f:     l=json.load(f)     print(l) # 用eval反序列化：eval只是单纯的将文件里的字符串运行变成对应的数据类型，而不会把json文件里卖弄的true，null转换成True，None with open('db.json','rt',encoding='utf-8') as f:     s=f.read() #s ='[1, true, null]'     dic=eval(s) #eval('[1, true, null]')     print(dic['name'])