Python exceptions.TypeError:无法将字典更新序列元素#1转换为序列？

我使用打开的项目scrapy从腾讯抓取视频评论，但出现了错误。我不知道该怎么弄清楚

2015-10-22 18:33:58 [scrapy] INFO: Scrapy 1.0.1 started (bot: qqtvurl)
2015-10-22 18:33:58 [scrapy] INFO: Optional features available: ssl, http11, boto
2015-10-22 18:33:58 [scrapy] INFO: Overridden settings: {'NEWSPIDER_MODULE': 'qqtvurl.spiders', 'SPIDER_MODULES': ['qqtvurl.spiders'], 'SCHEDULER': 'scrapy_redis.scheduler.Scheduler', 'BOT_NAME': 'qqtvurl'}
2015-10-22 18:33:58 [scrapy] INFO: Enabled extensions: CloseSpider, TelnetConsole, LogStats, CoreStats, SpiderState
2015-10-22 18:33:58 [qqtvspider] DEBUG: Reading URLs from redis list 'qqtvspider:star_urls'
Unhandled error in Deferred:
2015-10-22 18:33:58 [twisted] CRITICAL: Unhandled error in Deferred:


Traceback (most recent call last):
     File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\cmdline.py", line 150, in _run_command
cmd.run(args, opts)
     File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\commands\crawl.py", line 57, in run
self.crawler_process.crawl(spname, **opts.spargs)
     File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\crawler.py", line 153, in crawl
d = crawler.crawl(*args, **kwargs)
     File "D:\anzhuang\Anaconda\lib\site-packages\twisted\internet\defer.py", line 1274, in unwindGenerator
return _inlineCallbacks(None, gen, Deferred())
--- <exception caught here> ---
    File "D:\anzhuang\Anaconda\lib\site-packages\twisted\internet\defer.py", line 1128, in _inlineCallbacks
result = g.send(result)
    File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\crawler.py", line 71, in crawl
self.engine = self._create_engine()
   File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\crawler.py", line 83, in _create_engine
return ExecutionEngine(self, lambda _: self.stop())
  File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\core\engine.py", line 66, in __init__
self.downloader = downloader_cls(crawler)
  File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\core\downloader\__init__.py", line 65, in __init__
self.handlers = DownloadHandlers(crawler)
  File "D:\anzhuang\Anaconda\lib\site-packages\scrapy\core\downloader\handlers\__init__.py", line 17, in __init__
handlers.update(crawler.settings.get('DOWNLOAD_HANDLERS', {}))
exceptions.TypeError: cannot convert dictionary update sequence element #1 to a sequence
2015-10-22 18:33:58 [twisted] CRITICAL:

当我运行这个项目时，上面的错误就出现了。

---

非常感谢

这是因为您正在将序列元素设置到字典中

您应该输入：

DOWNLOAD_HANDLERS = {'S3': None,}

或者类似的事情

---

您可以阅读更多关于如何设置

下载\u处理程序的值的信息，这里有示例：
{'S3'，None，}
是一个
集
，而代码期望
下载\u处理程序
是一个
dict
或一系列（键，值）元组

将
{'S3'，None，}
替换为
{'S3'：None}
，您不应该出现此错误

DOWNLOAD_HANDLERS = {'S3': None,}