我是python的新手，我通過嘗試將連接變量分配給不同的.py文件中的函數而得到上述錯誤我試圖將連接設置為無，但沒有解決我的問題視圖.pyfrom datetime import datetimefrom flask import render_template, request, redirect, url_for, flashfrom FlaskWebProject1 import appimport jsonimport mysql.connectorfrom mysql.connector import Errorimport FlaskWebProject1.db @app.route('/')@app.route('/users')def users():  try:     lstUsers = ''    #connect to DB    connection = db.get_connection()    if connection.is_connected():        #db_Info = connection.get_server_info()        #print("Connected to MySQL Server version ", db_Info)        cursor = connection.cursor(dictionary=True)        cursor.execute("select * from users;")        record = cursor.fetchall()        lstUsers = record               #print("Your connected to database: ", record)  except Error as e:         print("Error while connecting to MySQL", e)   finally:        if (connection.is_connected()):            cursor.close()            connection.close()            print("MySQL connection is closed")  return render_template('users.html',    title = 'Users Page',     users = lstUsers)數據庫.py_connection = Nonedef get_connection():    global _connection    if not _connection:        _connection = mysql.connector.connect(user="bla@bla",                        password='bla',                        host="mysql.database.azure.com",                        port=3306,                        database='testdb')        return _connection# List of stuff accessible to importers of this module. Just in case__all__ = [ 'getConnection' ]