scrapyを用いてItemごとにcsvファイルを生成したい

前提・実現したいこと

scrapyのcrawlSpiderを用いてデータを収集した後、itemが一つなら scrapy spidername -o file.csv　でcsvにできるのですがItemが2つ以上になったときにcsvをItemごとに生成したいです。

python
1import logging
2import scrapy
3from scrapy.spiders import CrawlSpider, Rule
4from scrapy.linkextractors import LinkExtractor
5import re
6
7from .. import items
8
9
10class JtnewsSpider(CrawlSpider):
11    name = 'jtnews'
12    allowed_domains = ['www.jtnews.jp']
13    start_urls = ['http://www.jtnews.jp/cgi-bin/revlist.cgi?PAGE_NO=1']
14
15    rules = (
16        Rule(
17            LinkExtractor(allow=r"revlist.cgi?&?PAGE_NO=\d+$"),  # レビュワー名簿
18            callback="parse_user",
19            follow=False
20        ),
21        Rule(
22            LinkExtractor(allow=r"revper.cgi?&?REVPER_NO=\d+$"),  # 個人ページ
23            follow=True
24        ),
25        Rule(
26            LinkExtractor(allow=r"revper.cgi?&?PAGE_NO=\d+&REVPER_NO=\d+&TYPE=2$"),  # レビューの変更日付順化
27            callback="parse_review"
28        )
29    )
30
31    user_pattern = re.compile(r"REVPER_NO=(?P<user_id>\d+)")
32    movie_pattern = re.compile(r"TITLE_NO=(?P<movie_id>\d+)")
33
34    def parse_user(self, response):
35        try:
36            user_table = response.css("table.hover-table")
37            for link in user_table.css("a"):
38                user = items.UserItem()
39                user_url = link.css("a::attr(href)").get()
40                user["user_id"] = int(self.user_pattern.findall(user_url)[0])
41                user["name"] = link.css("a::text").get()
42                yield user
43        except:
44            self.log(f"parse failed: {response.url}", level=logging.ERROR)
45            yield scrapy.Request(
46                response.url, callback=self.parse_user, dont_filter=True
47            )
48
49    def parse_review(self, response):
50        try:
51            user_table = response.css("table.normal-table")[2]
52            for link in user_table.css("tr")[1:]:
53                review = items.ReviewItem()
54                review_url = link.css("a::attr(href)")[0].get()
55                review["movie_id"] = int(self.movie_pattern.findall(review_url)[0])
56                review["title"] = link.css("a::text")[0].get()
57                review["point"] = link.css("td::text").get()
58                yield review
59        except:
60            self.log(f"parse failed: {response.url}", level=logging.ERROR)
61            yield scrapy.Request(
62                response.url, callback=self.parse_review, dont_filter=True
63            )
64

python
1import scrapy
2
3
4class ReviewItem(scrapy.Item):
5    point = scrapy.Field(serializer=str)
6    movie_id = scrapy.Field(serializer=str)
7    title = scrapy.Field(serializer=str)
8
9
10class UserItem(scrapy.Item):
11    user_id = scrapy.Field(serializer=str)
12    name = scrapy.Field(serializer=str)
13
14