dumps是将dict转化成str格式，loads是将str转化成dict格式。

1.创建a（创建字典并把字典里的内容存入另一个文档）

import pickleaccounts = {    1000:{        "name":"alex li",        "email":"lijie@126.com",        "passwd":"adc123",        "balance":15000,        "phone":13651054608,        "bank_acc":{            "ICBC":2321434,            "CBC":413432,            "ABC":76568,        }    },    1001: {        "name": "chen li",        "email": "wangxiao@126.com",        "passwd": "adcewrf23",        "balance": 15000,        "phone": 13651054608,        "bank_acc": {            "ICBC": 23214434,            "CBC": 4132432,            "ABC": 7655668,        }    },}f = open("account.db","wb")#表示用写的模式打开文件，可以把每个输入的信息录入在文档里f.write(pickle.dumps(accounts))#dumps是将dict转化成str格式f.close()

　2：创建b（修改余额并实时更新内容，此处需要把str内容转成dic的内容）

import pickleacc_file_name = "account.db"account_file = open(acc_file_name,"rb")#以读的形式打开account_dic = pickle.loads(account_file.read())#加载字典数据其中loads将str转化成dict格式account_file.close()account_dic[1000]["balance"] -=500f = open(acc_file_name,"wb")#把更新后的内容写进原文档里f.write(pickle.dumps(account_dic))f.close()print(account_dic)#扣完钱在写入文件

3；创建c

 

import picklef = open("account.db","rb")account_db = pickle.loads(f.read())#loads是将str转化成dict格式。print(account_db)

　其中pickle模块与json大致相同