python strjson and dictionary conversion of json read and written in the file

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(1) Use the json conversion in the import json package

[1] Save the dictionary-type --transfer-string into the file

import json
import os
file_init=open("admin.txt",mode="w",encoding="utf-8")
    admin_dict={}
    admin_dict["name"]=name
    admin_dict["pwd"]=pwd
    # print("字典",admin_dict)
    # print("josn：",json.dumps(admin_dict))#json.dumps()用于将dict类型的数据转成str
    file_init.write(json.dumps(admin_dict)) # json.dumps()用于将dict类型的数据转成str

【2】Convert jsonStr—to—dictionary

 user_login_file = open("user.txt", mode="r", encoding="utf-8")
    file_data=user_login_file.read()
    user_read_dict = json.loads(file_data) #将jsonStr—转—字典

(2) Use the built-in functions that come with python to convert

[1] Save the dictionary-type --transfer-string into the file

import json
import os
file_init=open("admin.txt",mode="w",encoding="utf-8")
    admin_dict={}
    admin_dict["name"]=name
    admin_dict["pwd"]=pwd
    file_init.write(str(admin_dict)) #str()类型的数据转成str

【2】

Eval()：

1Evaluate the string as a valid expression and return the result

 2 A simple understanding is that the code inside is run directly (without preventing the injection of malicious code)

 user_login_file = open("user.txt", mode="r", encoding="utf-8")
    file_data=user_login_file.read()
    # {2}和我的写法不同处
    user_read_dict = eval(file_data)