Python 2.7 带有append（）问题的python scrapy爬虫

我从scrapy.org上取了这个例子。在我尝试将所有内容保存到items对象中之前，它工作得很好。append（item）显然是无效的语法，但本网站上的所有其他示例都具有相同的赋值

from scrapy.spider import BaseSpider
from scrapy.selector import HtmlXPathSelector

from tutorial.items import DmozItem

class DmozSpider(BaseSpider):
   name = "dmoz"
   allowed_domains = ["dmoz.org"]
   start_urls = [
         "http://www.dmoz.org/Computers/Programming/Languages/Python/Books/",
       "http://www.dmoz.org/Computers/Programming/Languages/Python/Resources/"
   ]

def parse(self, response):
   hxs = HtmlXPathSelector(response)
   sites = hxs.select('//ul/li')
   items = []
   for site in sites:
       item = DmozItem()
       item['title'] = site.select('a/text()').extract()
       item['link'] = site.select('a/@href').extract()
       item['desc'] = site.select('text()').extract()
       items.append(item)
   return items

错误是：

computerito@computerito-the-great ~/SHITSHOW/tutorial $ scrapy crawl         dmoz
2015-03-10 22:00:40-0700 [scrapy] INFO: Scrapy 0.14.4 started (bot: tutorial)
2015-03-10 22:00:40-0700 [scrapy] DEBUG: Enabled extensions: LogStats,     TelnetConsole, CloseSpider, WebService, CoreStats, MemoryUsage,     SpiderState
Traceback (most recent call last):
  File "/usr/bin/scrapy", line 4, in <module>
execute()
  File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 132, in execute
_run_print_help(parser, _run_command, cmd, args, opts)
File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 97, in _run_print_help
   func(*a, **kw)
File "/usr/lib/python2.7/dist-packages/scrapy/cmdline.py", line 139, in _run_command
cmd.run(args, opts)
File "/usr/lib/python2.7/dist-packages/scrapy/commands/crawl.py", line 43, in run
spider = self.crawler.spiders.create(spname, **opts.spargs)
File "/usr/lib/python2.7/dist-packages/scrapy/command.py", line 34, in crawler
self._crawler.configure()
File "/usr/lib/python2.7/dist-packages/scrapy/crawler.py", line 36, in configure
self.spiders = spman_cls.from_crawler(self)
File "/usr/lib/python2.7/dist-packages/scrapy/spidermanager.py", line 37, in from_crawler
return cls.from_settings(crawler.settings)
File "/usr/lib/python2.7/dist-packages/scrapy/spidermanager.py", line 33, in from_settings
return cls(settings.getlist('SPIDER_MODULES'))
File "/usr/lib/python2.7/dist-packages/scrapy/spidermanager.py", line 23, in __init__
for module in walk_modules(name):
File "/usr/lib/python2.7/dist-packages/scrapy/utils/misc.py", line 65, in walk_modules
submod = __import__(fullpath, {}, {}, [''])
File "/home/computerito/SHITSHOW/tutorial/tutorial/spiders/dmoz_spider.py", line 25
items.append(item)
    ^
SyntaxError: invalid syntax

computerito@computerito-伟大的~/SHITSHOW/教程$scrapy crawl dmoz
2015-03-10 22:00:40-0700[scrapy]信息：scrapy 0.14.4已启动（机器人：教程）
2015-03-10 22:00:40-0700[scrapy]调试：启用的扩展：LogStats、TelnetConsole、CloseSpider、WebService、CoreStats、MemoryUsage、SpiderState
回溯（最近一次呼叫最后一次）：
文件“/usr/bin/scrapy”，第4行，在
执行（）
文件“/usr/lib/python2.7/dist packages/scrapy/cmdline.py”，执行中的第132行
_运行\u打印\u帮助（解析器、\u运行\u命令、cmd、args、opts）
文件“/usr/lib/python2.7/dist packages/scrapy/cmdline.py”，第97行，在“运行”和“打印”帮助中
func（*a，**千瓦）
文件“/usr/lib/python2.7/dist packages/scrapy/cmdline.py”，第139行，在_run_命令中
cmd.run（参数、选项）
文件“/usr/lib/python2.7/dist-packages/scrapy/commands/crawl.py”，第43行，运行中
spider=self.crawler.spider.create（spname，**opts.spargs）
文件“/usr/lib/python2.7/dist packages/scrapy/command.py”，第34行，在crawler中
self.\u crawler.configure（）
文件“/usr/lib/python2.7/dist packages/scrapy/crawler.py”，第36行，在configure中
self.spider=spman\u cls.来自爬虫（self）
文件“/usr/lib/python2.7/dist packages/scrapy/spidermanager.py”，第37行，来自爬虫程序
从_设置（爬虫程序设置）返回cls
文件“/usr/lib/python2.7/dist packages/scrapy/spidermanager.py”，第33行，在from_设置中
返回cls（settings.getlist（'SPIDER_MODULES'））
文件“/usr/lib/python2.7/dist packages/scrapy/spidermanager.py”，第23行，在__
对于walk_模块中的模块（名称）：
文件“/usr/lib/python2.7/dist packages/scrapy/utils/misc.py”，第65行，在walk_模块中
submod=uuu导入（完整路径，{}，{}，[''']）
文件“/home/computerito/SHITSHOW/tutorial/tutorial/spider/dmoz_spider.py”，第25行
items.append（项目）
^
SyntaxError:无效语法

您得到的确切错误是什么？您可以编辑问题以添加此信息。有了这些信息，某人更有可能帮助你。在我运行你的代码时，找不到任何错误。