python mysql 字段与关键字冲突的解决方式

datas = {
  'sign_event':[
    {'id': 1, 'name': '华为mate9发布会' , 'limit': 100, 'status': 1, 'address': '会展中心1号厅', 'start_time': '2017-09-20 14:00:00','create_time':'2017-08-20 14:00:00'},
    {'id': 2, 'name': '华为P1000发布会' , 'limit': 200, 'status': 1, 'address': '会展中心2号厅', 'start_time': '2017-09-20 14:00:00','create_time':'2017-08-20 14:00:00'},
    {'id': 3, 'name': 'IPHONE888发布会' , 'limit': 300, 'status': 1, 'address': '会展中心3号厅', 'start_time': '2017-09-20 14:00:00','create_time':'2017-08-20 14:00:00'},
    {'id': 4, 'name': '半壁江山66演唱会' , 'limit': 400, 'status': 1, 'address': '会展中心4号厅', 'start_time': '2017-09-20 14:00:00','create_time':'2017-08-20 14:00:00'},
    {'id': 5, 'name': '金融P222222P上线' , 'limit': 500, 'status': 1, 'address': '会展中心5号厅', 'start_time': '2017-09-20 14:00:00','create_time':'2017-08-20 14:00:00'},
    {'id': 6, 'name': '未命名0000发布会' , 'limit': 600, 'status': 1, 'address': '会展中心6号厅', 'start_time': '2017-09-20 14:00:00','create_time':'2017-08-20 14:00:00'},
  ],
}

 for tablename,data in datas.items():
     for d in data:
       self.insert_datatable(tablename,d)
 self.close_dataConnetion()

 def insert_datatable(self, tablename, table_data):
    keys = {}
    for key in table_data:
      # 从数据字段中取出列名，列名用反单引号括起来；--解决列名与mysql关键字冲突
      keys[key] = "`"+str(key)+"`"
      table_data[key] = "'"+str(table_data[key])+"'"
    key = ','.join(keys.values())
    value = ','.join(table_data.values())
 
    sql = "INSERT INTO " + tablename + " ( " + key + " ) VALUES ( " + value +" );"
    with self.connection.cursor() as cursor:
      cursor.execute('SET FOREIGN_KEY_CHECKS=0;') #取消外键约束
      cursor.execute(sql)
    self.connection.commit()