Scrapy之奇葩坑你爹:TypeError: 'Rule' object is not iterable

使用Scrapy  提取器

设置好规则

rules = (
    Rule(LinkExtractor(allow=r'type=4&page=\d+'), callback="parse_pages", follow=True)
)

。。。

其他代码省略，只说关键代码；

满心期待运行 scrapy crawl myspider_name

CRITICAL: Unhandled error in Deferred:

2018-07-24 18:52:17 [twisted] CRITICAL: 
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/twisted/internet/defer.py", line 1418, in _inlineCallbacks
    result = g.send(result)
  File "/usr/local/lib/python3.7/site-packages/scrapy/crawler.py", line 79, in crawl
    self.spider = self._create_spider(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/scrapy/crawler.py", line 102, in _create_spider
    return self.spidercls.from_crawler(self, *args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/scrapy/spiders/crawl.py", line 100, in from_crawler
    spider = super(CrawlSpider, cls).from_crawler(crawler, *args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/scrapy/spiders/__init__.py", line 51, in from_crawler
    spider = cls(*args, **kwargs)
  File "/usr/local/lib/python3.7/site-packages/scrapy/spiders/crawl.py", line 40, in __init__
    self._compile_rules()
  File "/usr/local/lib/python3.7/site-packages/scrapy/spiders/crawl.py", line 92, in _compile_rules
    self._rules = [copy.copy(r) for r in self.rules]
TypeError: 'Rule' object is not iterable

尼玛，竟然报出一个严重的错误。

更为奇葩的是因为一个逗号的问题。。。

rules = (
    Rule(LinkExtractor(allow=r'type=4&page=\d+'), callback="parse_pages", follow=True),
)

在Rule规则 之后加个逗号，重新运行scrapy 爬虫，错误解决。。。