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AttributeError:'list'对象在scrapy中没有属性'items'

我正在使用python3.5进行scrapy然后发生了这种情况:

Traceback (most recent call last):

File "F:/PyCharm/xiaozhou/main.py", line 6, in <module>
    cmdline.execute("scrapy crawl nvospider".split())

File "F:\Python3.5\lib\site-packages\scrapy\cmdline.py", line 108, in execute
    settings = get_project_settings()

File "F:\Python3.5\lib\site-packages\scrapy\utils\project.py", line 60, in get_project_settings
    settings.setmodule(settings_module_path, priority='project')

File "F:\Python3.5\lib\site-packages\scrapy\settings\__init__.py", line 285, in setmodule
    self.set(key, getattr(module, key), priority)

File "F:\Python3.5\lib\site-packages\scrapy\settings\__init__.py", line 260, in set
    self.attributes[name].set(value, priority)

File "F:\Python3.5\lib\site-packages\scrapy\settings\__init__.py", line 55, in set
    value = BaseSettings(value, priority=priority)

File "F:\Python3.5\lib\site-packages\scrapy\settings\__init__.py", line 91, in __init__
    self.update(values, priority)

File "F:\Python3.5\lib\site-packages\scrapy\settings\__init__.py", line 317, in update
    for name, value in six.iteritems(values): 

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python mongodb scrapy

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