在scrapy / middleware.py文件中捕获scrapy错误：TypeError：__ init __（）缺少1个必需的位置参数：＆＃39; uri＆＃39;

Question

我在开始抓取时遇到此错误。我在几个论坛中搜索了一个答案，并查看了scrapy/middleware.py中的代码（标准为scrapy并且我没有改变它）并且无法弄清楚为什么我收到错误。

刮刀正在使用ImagesPipeline和S3FilesStore管道来存储json文件，并将图像直接下载到不同的S3文件夹中。我使用的是Python 3.6。

感谢任何帮助。错误信息和我的刮刀设置如下，如果有任何其他用处，请告诉我。

Traceback (most recent call last):
  File "/Users/user/anaconda/envs/python3/lib/python3.6/site-
packages/twisted/internet/defer.py", line 1386, in _inlineCallbacks
    result = g.send(result)
  File "/Users/user/anaconda/envs/python3/lib/python3.6/site-
packages/scrapy/crawler.py", line 77, in crawl
    self.engine = self._create_engine()
  File "/Users/user/anaconda/envs/python3/lib/python3.6/site-
packages/scrapy/crawler.py", line 102, in _create_engine
    return ExecutionEngine(self, lambda _: self.stop())
  File "/Users/user/anaconda/envs/python3/lib/python3.6/site-
packages/scrapy/core/engine.py", line 70, in __init__
    self.scraper = Scraper(crawler)
  File "/Users/user/anaconda/envs/python3/lib/python3.6/site-
packages/scrapy/core/scraper.py", line 71, in __init__
    self.itemproc = itemproc_cls.from_crawler(crawler)
  File "/Users/user/anaconda/envs/python3/lib/python3.6/site-
packages/scrapy/middleware.py", line 58, in from_crawler
    return cls.from_settings(crawler.settings, crawler)
  File "/Users/user/anaconda/envs/python3/lib/python3.6/site-
packages/scrapy/middleware.py", line 40, in from_settings
    mw = mwcls()
TypeError: __init__() missing 1 required positional argument: 'uri'

ITEM_PIPELINES = {
    'scrapy.pipelines.files.S3FilesStore': 1,
    'scrapy.pipelines.images.ImagesPipeline': 1
}

AWS_ACCESS_KEY_ID = 'xxxxxx'
AWS_SECRET_ACCESS_KEY= 'xxxxxx'

IMAGES_STORE = 's3 path'

FEED_URI = 's3 path'
FEED_FORMAT = 'jsonlines'
FEED_EXPORT_FIELDS = None
FEED_STORE_EMPTY = False
FEED_STORAGES = {}
FEED_STORAGES_BASE = {
'': 'scrapy.extensions.feedexport.FileFeedStorage',
'file': 'scrapy.extensions.feedexport.FileFeedStorage',
'stdout': 'scrapy.extensions.feedexport.StdoutFeedStorage',
's3': 'scrapy.extensions.feedexport.S3FeedStorage',
'ftp': 'scrapy.extensions.feedexport.FTPFeedStorage',
}
FEED_EXPORTERS = {}
FEED_EXPORTERS_BASE = {
    'json': 'scrapy.exporters.JsonItemExporter',
    'jsonlines': 'scrapy.exporters.JsonLinesItemExporter',
    'jl': None,
    'csv': None,
    'xml': None,
    'marshal': None,
    'pickle': None,
}