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Code Releases Wiki Activity

DOC selectors.rst cleanup

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Mikhail Korobov 2014-04-24 22:54:17 +06:00
parent 5f18816428
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docs/topics/selectors.rst
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@ -199,8 +199,8 @@ too. Here's an example::
u'<a href="image5.html">Name: My image 5 <br><img src="image5_thumb.jpg"></a>'] u'<a href="image5.html">Name: My image 5 <br><img src="image5_thumb.jpg"></a>']
>>> for index, link in enumerate(links): >>> for index, link in enumerate(links):
args = (index, link.xpath('@href').extract(), link.xpath('img/@src').extract()) ... args = (index, link.xpath('@href').extract(), link.xpath('img/@src').extract())
print 'Link number %d points to url %s and image %s' % args ... print 'Link number %d points to url %s and image %s' % args
Link number 0 points to url [u'image1.html'] and image [u'image1_thumb.jpg'] Link number 0 points to url [u'image1.html'] and image [u'image1_thumb.jpg']
Link number 1 points to url [u'image2.html'] and image [u'image2_thumb.jpg'] Link number 1 points to url [u'image2.html'] and image [u'image2_thumb.jpg']
@ -245,17 +245,17 @@ it actually extracts all ``<p>`` elements from the document, not only those
inside ``<div>`` elements:: inside ``<div>`` elements::
>>> for p in divs.xpath('//p'): # this is wrong - gets all <p> from the whole document >>> for p in divs.xpath('//p'): # this is wrong - gets all <p> from the whole document
>>> print p.extract() ... print p.extract()
This is the proper way to do it (note the dot prefixing the ``.//p`` XPath):: This is the proper way to do it (note the dot prefixing the ``.//p`` XPath)::
>>> for p in divs.xpath('.//p'): # extracts all <p> inside >>> for p in divs.xpath('.//p'): # extracts all <p> inside
>>> print p.extract() ... print p.extract()
Another common case would be to extract all direct ``<p>`` children:: Another common case would be to extract all direct ``<p>`` children::
>>> for p in divs.xpath('p'): >>> for p in divs.xpath('p'):
>>> print p.extract() ... print p.extract()
For more details about relative XPaths see the `Location Paths`_ section in the For more details about relative XPaths see the `Location Paths`_ section in the
XPath specification. XPath specification.
@ -375,7 +375,7 @@ with groups of itemscopes and corresponding itemprops::
... .//*[@itemscope]/*/@itemprop)''') ... .//*[@itemscope]/*/@itemprop)''')
... print " properties:", props.extract() ... print " properties:", props.extract()
... print ... print
...
current scope: [u'http://schema.org/Product'] current scope: [u'http://schema.org/Product']
properties: [u'name', u'aggregateRating', u'offers', u'description', u'review', u'review'] properties: [u'name', u'aggregateRating', u'offers', u'description', u'review', u'review']
@ -560,7 +560,7 @@ a :class:`~scrapy.http.HtmlResponse` object like this::
3. Iterate over all ``<p>`` tags and print their class attribute:: 3. Iterate over all ``<p>`` tags and print their class attribute::
for node in sel.xpath("//p"): for node in sel.xpath("//p"):
... print node.xpath("@class").extract() print node.xpath("@class").extract()
Selector examples on XML response Selector examples on XML response
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~