跟着老师敲代码，还是一直报错
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "C:\Users\Administrator\douban\douban\spiders\douban_spider.py", line 3, in <module>
from douban.items import DoubanItem
File "C:\Users\Administrator\douban\douban\items.py", line 11, in <module>
class DoubanItem(scrapy.Item):
File "C:\Users\Administrator\douban\douban\items.py", line 15, in DoubanItem
serial_number = scrapy.field()
AttributeError: module 'scrapy' has no attribute 'field'
