如何使用flask应用程序中的MySQL在我的数据库中存储用户输入的数据。我收到一个错误

from flask import Flask
from flask_mysqldb import MySQL

app = Flask(__name__)
app.config['MYSQL_HOST'] = 'localhost'
app.config['MYSQL_USER'] = 'your_username'
app.config['MYSQL_PASSWORD'] = 'your_password'
app.config['MYSQL_DB'] = 'your_database_name'

mysql = MySQL(app)

from flask import Flask, request
from flask_mysqldb import MySQL

app = Flask(__name__)
app.config['MYSQL_HOST'] = 'localhost'
app.config['MYSQL_USER'] = 'your_username'
app.config['MYSQL_PASSWORD'] = 'your_password'
app.config['MYSQL_DB'] = 'your_database_name'

mysql = MySQL(app)

@app.route('/save_data', methods=['POST'])
def save_data():
    try:
        data = request.form['data']
        cur = mysql.connection.cursor()
        cur.execute("INSERT INTO your_table_name (column_name) VALUES (%s)", (data,))
        mysql.connection.commit()
        cur.close()
        return 'Data saved successfully'
    except Exception as e:
        return 'Error: ' + str(e)

if __name__ == '__main__':
    app.run()