如何在类内发起Snowflake连接？

import snowflake.connector

class SnowflakeConnection:
    def __init__(self):
        self.account = 'your_account'
        self.user = 'your_username'
        self.password = 'your_password'
        self.database = 'your_database'
        self.schema = 'your_schema'
        self.conn = None

    def connect(self):
        try:
            self.conn = snowflake.connector.connect(
                account=self.account,
                user=self.user,
                password=self.password,
                database=self.database,
                schema=self.schema
            )
            print("Snowflake connection established successfully!")
        except Exception as e:
            print("Error connecting to Snowflake: ", str(e))

    def execute_query(self, query):
        try:
            cursor = self.conn.cursor()
            cursor.execute(query)
            result = cursor.fetchall()
            cursor.close()
            return result
        except Exception as e:
            print("Error executing query: ", str(e))

# 示例用法
snowflake_conn = SnowflakeConnection()
snowflake_conn.connect()
result = snowflake_conn.execute_query("SELECT * FROM your_table")
print(result)