Scrapy: AttributeError: 'list' object has no attribute 'iteritems'

Question

这是我关于堆栈溢出的第一个问题。最近想用linked-in-scraper，所以下载了指令"scrapy crawl linkedin.com"，得到下面的错误信息。供您参考，我使用 anaconda 2.3.0 和 python 2.7.11。所有相关包，包括 scrapy 和 six，在执行程序之前通过 pip 更新。

Traceback (most recent call last):
  File "/Users/byeongsuyu/anaconda/bin/scrapy", line 11, in <module>
    sys.exit(execute())
File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/scrapy/cmdline.py", line 108, in execute
settings = get_project_settings()
File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/scrapy/utils/project.py", line 60, in get_project_settings
settings.setmodule(settings_module_path, priority='project')
File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/scrapy/settings/__init__.py", line 285, in setmodule
self.set(key, getattr(module, key), priority)
  File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/scrapy/settings/__init__.py", line 260, in set
self.attributes[name].set(value, priority)
  File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/scrapy/settings/__init__.py", line 55, in set
value = BaseSettings(value, priority=priority)
  File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/scrapy/settings/__init__.py", line 91, in __init__
self.update(values, priority)
  File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/scrapy/settings/__init__.py", line 317, in update
for name, value in six.iteritems(values):
  File "/Users/byeongsuyu/anaconda/lib/python2.7/site-packages/six.py", line 599, in iteritems
return d.iteritems(**kw)

AttributeError: 'list' object has no attribute 'iteritems'

我了解到这个错误源于d不是字典类型而是列表类型。而且由于错误来自scrapy上的代码，所以可能是scrapy包或六包上的问题。我该如何尝试修复此错误？

编辑： 这是来自 scrapy.cfg

的代码

  # Automatically created by: scrapy start project
  #
  # For more information about the [deploy] section see:
  # http://doc.scrapy.org/topics/scrapyd.html
  [settings]  
  default = linkedIn.settings

   [deploy]
   #url = http://localhost:6800/
   project = linkedIn

Answer 1

这是由于内链爬虫的 settings:

ITEM_PIPELINES = ['linkedIn.pipelines.LinkedinPipeline']

然而，ITEM_PIPELINES应该是一个字典，according to the doc:

To activate an Item Pipeline component you must add its class to the ITEM_PIPELINES setting, like in the following example:
ITEM_PIPELINES = {
    'myproject.pipelines.PricePipeline': 300,
    'myproject.pipelines.JsonWriterPipeline': 800,
}
The integer values you assign to classes in this setting determine the order in which they run: items go through from lower valued to higher valued classes. It’s customary to define these numbers in the 0-1000 range.

根据this question，它曾经是一个列表，这就解释了为什么这个爬虫使用列表。所以你将不得不要求你的爬虫开发者更新他们的代码，或者自己设置 ITEM_PIPELINES。

Answer 2

简短的回答是 ITEM_PIPELINES 应该是一个字典而不是一个列表，键作为管道 class 并且值是一个整数，它决定了它们运行的顺序：项目从低价值到高价值 classes。通常将这些数字定义在 0-1000 范围内。正如@valentin Lorentz

所解释的

Scrapy: AttributeError: 'list' object has no attribute 'iteritems'

Scrapy: AttributeError: 'list' object has no attribute 'iteritems'

python

scrapy-spider

six