import sqlite3

db_name = 'mydb.db'

class User:
    def __init__(self,name,email,age):
        self.__id = None
        self.__name = name
        self.__email = email
        self.__age = age

    @property
    def name(self):
        return self.__name
    @name.setter
    def name(self,value):
        self.__name = value
        
    @property
    def email(self):
        return self.__email

    @email.setter
    def email(self,value):
        if '@' in value:
            self.__email = value
        else:
            raise ValueError('Не корректный адрес почты')
    @property
    def age(self):
        return self.__age
    @age.setter
    def age(self,value):
        if 0 <= value <= 120:
            self.__age = value
        else:
            raise ValueError('Неправильно указан возраст')
        
    def save(self):
        conn = sqlite3.connect(db_name)
        cursor = conn.cursor()
        property_list = [f"{k}" for k, v in User.__dict__.items() if isinstance(v, property)]
        if '_User__id' in self.__dict__.keys():
            update_string = ','.join([f'`{p_name}`= ? ' for p_name in property_list])
            update_values = [getattr(self,p) for p in property_list] + [self.__id]
            query = f"UPDATE {User.__name__} SET {update_string} WHERE id = ?"
            print(query,update_values)
        else:
            property_count = ('?,'*len(property_list))[:-1] #','.join(['?' for _ in range(len(property_list))])
            property_names = ','.join(property_list)
            property_values = [getattr(self,p) for p in property_list]
            query = f"INSERT INTO {User.__name__}({property_names}) VALUES({property_count})"
            print(query,property_values)
            cursor.execute(query,property_values)
            conn.commit()
            self.__id = cursor.lastrowid
        conn.close()
#print(User.__dict__)

user1 = User('Igor','igor@example.com',44)
user1.save()
user1.age = 55
user1.save()