Question

当我在控制台中测试我的模块时没有给出错误，但是当我尝试从浏览器接收数据时，我收到一条错误消息：

UnboundLocalError: local variable 'mile' referenced before assignment

这是我的代码的相关部分：

while cursor.alive:                
    try:
        doc = yield motor.Op(cursor.next_object)
        if doc:
            mileInfo={'time': doc['time_normal']}
            print doc['term']

            if doc['term'] == 'abc':
                event = 'abc'
            elif doc['term'] == 'def':
                event = 'def'
            elif doc['term'] == 'xyz':
                 event = 'xyz'    
            else:
                 event = 'rst'


             if not doc['coordinates']:
                 placeName = doc['place']['full_name']                          
                 mile = from_name(placeName, event)
                 print 'from Name: ' ,mile, 'term: ', event, doc['place']['full_name'] 
             else: 
                 mile = get_coords(doc['coordinates']['coordinates'], event)
                print 'from coordinates: ',mile, 'term: ', event, 'location:', doc['coordinates']['coordinates']                                                                  

               mileInfo['miles'] = mile
               self.write_message(json.dumps(mileInfo, default = json_util.default))

        except StopIteration:
            pass

    except:
            traceback.print_exc()

我很困惑，为什么我只能从网络浏览器中收到此错误。

谢谢

Answer 1

我能够通过声明一个全局变量'mile'并通过清理缩进来排序错误（感谢建议@MartijnPieters）。所以我在这里插入了一个全局变量：

while cursor.alive:
    try:
        doc = yield motor.Op(cursor.next_object)
        global mile

        if doc: ...............

在python中将数据发送到Web浏览器时出错

1 个答案: