scrapyでhtmlの内部をcssセレクタを利用の上とりたいが、エラーが出て使えない

Scrapyを利用して、パリ市交通局のデータサイトからデータセット概要のリストを制作したいと考えています。しかし、以下に示すエラーが出てきてしまい、うまく進みません。どなたかご教示願います。
エラーの内容は、大きく分けて2種類と推察しています。

Spider error processing <GET https://data.ratp.fr/explore/?sort=modified> (referer: None)
Post.callback is not defined

参考にしているサイトはこちらです。

python3
1#filename:items.py
2# -*- coding: utf-8 -*-
3import scrapy
4
5class Post(scrapy.Item):
6    url = scrapy.Field()
7    title = scrapy.Field()
8    description = scrapy.Field()
9

python3
1#filename:scrapy_blog_spider2.py
2# -*- coding: utf-8 -*-
3import scrapy
4from ten_min_scrapy.items import Post
5
6class Post(scrapy.Spider):
7    name = 'scrapy_blog_spider2'
8    allowed_domains = ['data.ratp.fr/explore/']
9    start_urls = ['https://data.ratp.fr/explore/?sort=modified']
10
11
12
13def parse(self, response):
14        """
15        レスポンスに対するパース処理
16        """
17        # response.css で scrapy デフォルトの css セレクタを利用できる
18        for post in response.css('.ods-catalog-card__body'):
19            # items に定義した Post のオブジェクトを生成して次の処理へ渡す
20            yield Post(
21                url=post.css('ods-catalog-card-title a::attr(href)').extract_first().strip(),
22                title=post.css('ods-catalog-card-title a::text').extract_first().strip(),
23                description=post.css('ods-catalog-card-description p::text').extract_first().strip(),
24            )
25

$ scrapy crawl scrapy_blog_spider2

response
12020-02-13 16:47:07 [scrapy.utils.log] INFO: Scrapy 1.8.0 started (bot: ten_min_scrapy)
22020-02-13 16:47:07 [scrapy.utils.log] INFO: Versions: lxml 4.3.2.0, libxml2 2.9.9, cssselect 1.1.0, parsel 1.5.2, w3lib 1.21.0, Twisted 19.10.0, Python 3.7.3 (default, Mar 27 2019, 16:54:48) - [Clang 4.0.1 (tags/RELEASE_401/final)], pyOpenSSL 19.0.0 (OpenSSL 1.1.1b  26 Feb 2019), cryptography 2.6.1, Platform Darwin-18.5.0-x86_64-i386-64bit
32020-02-13 16:47:07 [scrapy.crawler] INFO: Overridden settings: {'BOT_NAME': 'ten_min_scrapy', 'DOWNLOAD_DELAY': 3, 'HTTPCACHE_ENABLED': True, 'NEWSPIDER_MODULE': 'ten_min_scrapy.spiders', 'ROBOTSTXT_OBEY': True, 'SPIDER_MODULES': ['ten_min_scrapy.spiders']}
42020-02-13 16:47:07 [scrapy.extensions.telnet] INFO: Telnet Password: 1389f773032239f8
52020-02-13 16:47:07 [scrapy.middleware] INFO: Enabled extensions:
6['scrapy.extensions.corestats.CoreStats',
7 'scrapy.extensions.telnet.TelnetConsole',
8 'scrapy.extensions.memusage.MemoryUsage',
9 'scrapy.extensions.logstats.LogStats']
102020-02-13 16:47:07 [scrapy.middleware] INFO: Enabled downloader middlewares:
11['scrapy.downloadermiddlewares.robotstxt.RobotsTxtMiddleware',
12 'scrapy.downloadermiddlewares.httpauth.HttpAuthMiddleware',
13 'scrapy.downloadermiddlewares.downloadtimeout.DownloadTimeoutMiddleware',
14 'scrapy.downloadermiddlewares.defaultheaders.DefaultHeadersMiddleware',
15 'scrapy.downloadermiddlewares.useragent.UserAgentMiddleware',
16 'scrapy.downloadermiddlewares.retry.RetryMiddleware',
17 'scrapy.downloadermiddlewares.redirect.MetaRefreshMiddleware',
18 'scrapy.downloadermiddlewares.httpcompression.HttpCompressionMiddleware',
19 'scrapy.downloadermiddlewares.redirect.RedirectMiddleware',
20 'scrapy.downloadermiddlewares.cookies.CookiesMiddleware',
21 'scrapy.downloadermiddlewares.httpproxy.HttpProxyMiddleware',
22 'scrapy.downloadermiddlewares.stats.DownloaderStats',
23 'scrapy.downloadermiddlewares.httpcache.HttpCacheMiddleware']
242020-02-13 16:47:07 [scrapy.middleware] INFO: Enabled spider middlewares:
25['scrapy.spidermiddlewares.httperror.HttpErrorMiddleware',
26 'scrapy.spidermiddlewares.offsite.OffsiteMiddleware',
27 'scrapy.spidermiddlewares.referer.RefererMiddleware',
28 'scrapy.spidermiddlewares.urllength.UrlLengthMiddleware',
29 'scrapy.spidermiddlewares.depth.DepthMiddleware']
302020-02-13 16:47:07 [scrapy.middleware] INFO: Enabled item pipelines:
31[]
322020-02-13 16:47:07 [scrapy.core.engine] INFO: Spider opened
332020-02-13 16:47:07 [scrapy.extensions.logstats] INFO: Crawled 0 pages (at 0 pages/min), scraped 0 items (at 0 items/min)
342020-02-13 16:47:07 [scrapy.extensions.httpcache] DEBUG: Using filesystem cache storage in /Users/u.nagata/ten_min_scrapy/.scrapy/httpcache
352020-02-13 16:47:07 [scrapy.extensions.telnet] INFO: Telnet console listening on 127.0.0.1:6023
362020-02-13 16:47:07 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://data.ratp.fr/robots.txt> (referer: None) ['cached']
372020-02-13 16:47:07 [scrapy.core.engine] DEBUG: Crawled (200) <GET https://data.ratp.fr/explore/?sort=modified> (referer: None) ['cached']
382020-02-13 16:47:07 [scrapy.core.scraper] ERROR: Spider error processing <GET https://data.ratp.fr/explore/?sort=modified> (referer: None)
39Traceback (most recent call last):
40  File "/anaconda3/lib/python3.7/site-packages/twisted/internet/defer.py", line 654, in _runCallbacks
41    current.result = callback(current.result, *args, **kw)
42  File "/anaconda3/lib/python3.7/site-packages/scrapy/spiders/__init__.py", line 80, in parse
43    raise NotImplementedError('{}.parse callback is not defined'.format(self.__class__.__name__))
44NotImplementedError: Post.parse callback is not defined
452020-02-13 16:47:07 [scrapy.core.engine] INFO: Closing spider (finished)
462020-02-13 16:47:07 [scrapy.statscollectors] INFO: Dumping Scrapy stats:
47{'downloader/request_bytes': 454,
48 'downloader/request_count': 2,
49 'downloader/request_method_count/GET': 2,
50 'downloader/response_bytes': 6178,
51 'downloader/response_count': 2,
52 'downloader/response_status_count/200': 2,
53 'elapsed_time_seconds': 0.228215,
54 'finish_reason': 'finished',
55 'finish_time': datetime.datetime(2020, 2, 13, 7, 47, 7, 553588),
56 'httpcache/hit': 2,
57 'log_count/DEBUG': 3,
58 'log_count/ERROR': 1,
59 'log_count/INFO': 10,
60 'memusage/max': 52031488,
61 'memusage/startup': 52031488,
62 'response_received_count': 2,
63 'robotstxt/request_count': 1,
64 'robotstxt/response_count': 1,
65 'robotstxt/response_status_count/200': 1,
66 'scheduler/dequeued': 1,
67 'scheduler/dequeued/memory': 1,
68 'scheduler/enqueued': 1,
69 'scheduler/enqueued/memory': 1,
70 'spider_exceptions/NotImplementedError': 1,
71 'start_time': datetime.datetime(2020, 2, 13, 7, 47, 7, 325373)}

行動規範の内容に同意します

回答1件

ベストアンサー

scrapy_blog_spider2.pyのインデントがよろしくないかと。

python
1class Post(scrapy.Spider):
2    name = 'scrapy_blog_spider2'
3    allowed_domains = ['data.ratp.fr/explore/']
4    start_urls = ['https://data.ratp.fr/explore/?sort=modified']
5
6
7
8def parse(self, response):
9        """
10        レスポンスに対するパース処理
11        """
12
13↓
14
15class Post(scrapy.Spider):
16    name = 'scrapy_blog_spider2'
17    allowed_domains = ['data.ratp.fr/explore/']
18    start_urls = ['https://data.ratp.fr/explore/?sort=modified']
19
20
21
22    def parse(self, response):
23        """
24        レスポンスに対するパース処理
25        """