BackTrackZ/scrapy
BackTrackZ/scrapy
1
0
Fork 0
mirror of https://github.com/scrapy/scrapy.git synced 2025-02-25 04:04:21 +00:00
Code Releases Wiki Activity

More replaces of references to old sel shortcut

Browse Source
This commit is contained in:
Daniel Graña 2015-04-12 21:56:23 -03:00
parent f9208dbcc4
commit f71175a449
1 changed files with 3 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
docs/topics/selectors.rst
View File

@ -141,12 +141,12 @@ method, as follows::
If you want to extract only first matched element, you can call the selector ``.extract_first()``
>>> sel.xpath('//div[@id="images"]/a/text()').extract_first()
>>> response.xpath('//div[@id="images"]/a/text()').extract_first()
u'Name: My image 1 '
It returns ``None`` if no element was found:
>>> sel.xpath('//div/[id="not-exists"]/text()').extract_first() is None
>>> response.xpath('//div/[id="not-exists"]/text()').extract_first() is None
True
Notice that CSS selectors can select text or attribute nodes using CSS3
@ -383,7 +383,7 @@ with groups of itemscopes and corresponding itemprops::
... ...
... </div>
... """
>>>
>>> sel = Selector(text=doc, type="html")
>>> for scope in sel.xpath('//div[@itemscope]'):
... print "current scope:", scope.xpath('@itemtype').extract()
... props = scope.xpath('''