Question

在scrapy中，我收到错误exceptions.AttributeError: 'unicode' object has no attribute 'dont_filter'。在搜索之后，我发现this回答（这是有意义的，因为它是我在获取错误之前修改的唯一代码），据此我修改了我的代码。我改变了start_request以在列表中产生值，而不是将它全部重新整理，但我仍然得到它。有什么想法吗？

def start_requests(self):
    connection = pymongo.Connection(settings['MONGODB_SERVER'],
                                    settings['MONGODB_PORT'])
    db = connection[settings['MONGODB_DB']]
    collection = db[settings['MONGODB_COLLECTION']]
    for el in [i['url'] for i in collection.find({}, {'_id':0, 'url':1})]:
        yield el

我已经检查了代码的其他部分，以确认其他一切都没问题。

回溯：

[-] Unhandled Error
    Traceback (most recent call last):
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/scrapy/crawler.py", line 93, in start
        self.start_reactor()
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/scrapy/crawler.py", line 130, in start_reactor
        reactor.run(installSignalHandlers=False)  # blocking call
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/twisted/internet/base.py", line 1192, in run
        self.mainLoop()
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/twisted/internet/base.py", line 1201, in mainLoop
        self.runUntilCurrent()
    --- <exception caught here> ---
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/twisted/internet/base.py", line 824, in runUntilCurrent
        call.func(*call.args, **call.kw)
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/scrapy/utils/reactor.py", line 41, in __call__
        return self._func(*self._a, **self._kw)
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/scrapy/core/engine.py", line 120, in _next_request
        self.crawl(request, spider)
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/scrapy/core/engine.py", line 176, in crawl
        self.schedule(request, spider)
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/scrapy/core/engine.py", line 182, in schedule
        return self.slot.scheduler.enqueue_request(request)
      File "/home/myName/scrapy-test/venv/local/lib/python2.7/site-packages/scrapy/core/scheduler.py", line 48, in enqueue_request
        if not request.dont_filter and self.df.request_seen(request):
    exceptions.AttributeError: 'unicode' object has no attribute 'dont_filter'

Answer 1

start_requests应该生成单独的Request对象，而不仅仅是单个URL。但是代码中的每个el显然都是一个URL。尝试更改

yield el

到

yield self.make_requests_from_url(el)

（请参阅您链接的问题以获取此示例）

scrapy：exceptions.AttributeError：'unicode'对象没有属性'dont_filter'

1 个答案: