exceptions.KeyError: 'TrainingItem does not support field: start'

[zqp821...@gmail.com]

class TrainingItem(Item):

    course = Field()

    desc = Field()

    start = Field

    end = Field()

    school = Field

    trainId = Field()

    id = Field()

course = hxs.xpath(u'//h3[text()="XXXX"]/../h2[%s]/text()'%x).re(r'\S+')

                if course:

                    

                    train_item["start"] = course[0]

                    

                    train_item["end"] = course[2]

                    

                    train_item["course"] = course[3]

2015-01-23 19:32:14+0800 [zlzp] ERROR: Spider error processing <GET 

        Traceback (most recent call last):

          File "C:\python27\lib\site-packages\twisted\internet\base.py", line 82

4, in runUntilCurrent

            call.func(*call.args, **call.kw)

          File "C:\python27\lib\site-packages\twisted\internet\task.py", line 63

8, in _tick

            taskObj._oneWorkUnit()

          File "C:\python27\lib\site-packages\twisted\internet\task.py", line 48

4, in _oneWorkUnit

            result = next(self._iterator)

          File "C:\python27\lib\site-packages\scrapy-0.24.4-py2.7.egg\scrapy\uti

ls\defer.py", line 57, in <genexpr>

            work = (callable(elem, *args, **named) for elem in iterable)

        --- <exception caught here> ---

          File "C:\python27\lib\site-packages\scrapy-0.24.4-py2.7.egg\scrapy\uti

ls\defer.py", line 96, in iter_errback

            yield next(it)

          File "C:\python27\lib\site-packages\scrapy-0.24.4-py2.7.egg\scrapy\con

trib\spidermiddleware\offsite.py", line 26, in process_spider_output

            for x in result:

          File "C:\python27\lib\site-packages\scrapy-0.24.4-py2.7.egg\scrapy\con

trib\spidermiddleware\referer.py", line 22, in <genexpr>

            return (_set_referer(r) for r in result or ())

          File "C:\python27\lib\site-packages\scrapy-0.24.4-py2.7.egg\scrapy\con

trib\spidermiddleware\urllength.py", line 33, in <genexpr>

            return (r for r in result or () if _filter(r))

          File "C:\python27\lib\site-packages\scrapy-0.24.4-py2.7.egg\scrapy\con

trib\spidermiddleware\depth.py", line 50, in <genexpr>

            return (r for r in result or () if _filter(r))

          File "C:\Users\Administrator\Desktop\ZLZP\ZLZP\zlzp_spiders\spiders_co

okie.py", line 392, in parse_item

            train_item["start"] = course[0]

          File "C:\python27\lib\site-packages\scrapy-0.24.4-py2.7.egg\scrapy\ite

m.py", line 57, in __setitem__

            (self.__class__.__name__, key))

        exceptions.KeyError: 'TrainingItem does not support field: start'

[Paul Tremberth]

You're missign parentheses for the "start" field:

class TrainingItem(Item):

    course = Field()

    desc = Field()

    start = Field()   # <--- here

[zqp821...@gmail.com]

thanks

在 2015年1月23日星期五 UTC+8下午7:56:29，Paul Tremberth写道：

[赵赵启朋]

Thank you Paul.

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