如何将数据库连接传递给类构造函数？

import mysql.connector

class MyClass:
    def __init__(self, db_connection):
        self.db_connection = db_connection

    def query_data(self):
        cursor = self.db_connection.cursor()
        cursor.execute("SELECT * FROM my_table")
        result = cursor.fetchall()
        cursor.close()
        return result

# 创建数据库连接
db_connection = mysql.connector.connect(
    host="localhost",
    user="username",
    password="password",
    database="my_database"
)

# 将数据库连接传递给类构造函数
my_object = MyClass(db_connection)

# 使用数据库连接执行查询操作
data = my_object.query_data()
print(data)