在类中创建Json文件

import json

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

    def to_json(self):
        return json.dumps(self.__dict__)

    @classmethod
    def from_json(cls, json_str):
        data = json.loads(json_str)
        return cls(**data)

# 创建一个Person实例
person = Person("Alice", 30, "alice@example.com")

# 将实例转换为JSON字符串
json_str = person.to_json()
print(f"JSON String: {json_str}")

# 将JSON字符串保存到文件
with open('person.json', 'w') as file:
    file.write(json_str)

# 从文件中读取JSON字符串并转换回Person实例
with open('person.json', 'r') as file:
    loaded_json_str = file.read()
    loaded_person = Person.from_json(loaded_json_str)
    print(f"Loaded Person: {loaded_person.name}, {loaded_person.age}, {loaded_person.email}")