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Code Releases Wiki Activity

CrawlerRunner.create_crawler method

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This commit is contained in:
Mikhail Korobov 2015-10-06 02:20:04 +05:00
parent caf2080b80
commit 11b11c9803
1 changed files with 16 additions and 3 deletions
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19
scrapy/crawler.py
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@ -148,9 +148,7 @@ class CrawlerRunner(object):
:param dict kwargs: keyword arguments to initialize the spider
"""
crawler = crawler_or_spidercls
if not isinstance(crawler_or_spidercls, Crawler):
crawler = self._create_crawler(crawler_or_spidercls)
crawler = self.create_crawler(crawler_or_spidercls)
return self._crawl(crawler, *args, **kwargs)
def _crawl(self, crawler, *args, **kwargs):
@ -165,6 +163,21 @@ class CrawlerRunner(object):
return d.addBoth(_done)
def create_crawler(self, crawler_or_spidercls):
"""
Return a :class:`~scrapy.crawler.Crawler` object.
* If `crawler_or_spidercls` is a Crawler, it is returned as-is.
* If `crawler_or_spidercls` is a Spider subclass, a new Crawler
is constructed for it.
* If `crawler_or_spidercls` is a string, this function finds
a spider with this name in a Scrapy project (using spider loader),
then creates a Crawler instance for it.
"""
if isinstance(crawler_or_spidercls, Crawler):
return crawler_or_spidercls
return self._create_crawler(crawler_or_spidercls)
def _create_crawler(self, spidercls):
if isinstance(spidercls, six.string_types):
spidercls = self.spider_loader.load(spidercls)