如何链接items.py和我的爬虫文件？

import scrapy

class MyItem(scrapy.Item):
    title = scrapy.Field()
    author = scrapy.Field()
    content = scrapy.Field()

import scrapy
from myproject.items import MyItem

class MySpider(scrapy.Spider):
    name = 'myspider'
    start_urls = ['http://example.com']

    def parse(self, response):
        item = MyItem()
        item['title'] = response.css('h1::text').get()
        item['author'] = response.css('.author::text').get()
        item['content'] = response.css('.content::text').get()
        yield item

scrapy crawl myspider