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def test_extending_selector(self):
class MySelectorList(Selector.selectorlist_cls):
pass
class MySelector(Selector):
selectorlist_cls = MySelectorList
sel = MySelector(text=u'<div>foo</div>')
self.assertIsInstance(sel.xpath('//div'), MySelectorList)
self.assertIsInstance(sel.xpath('//div')[0], MySelector)
self.assertIsInstance(sel.css('div'), MySelectorList)
self.assertIsInstance(sel.css('div')[0], MySelector)
__all__ = ['Selector', 'SelectorList']
def _st(response, st):
if st is None:
return 'xml' if isinstance(response, XmlResponse) else 'html'
return st
def _response_from_text(text, st):
rt = XmlResponse if st == 'xml' else HtmlResponse
return rt(url='about:blank', encoding='utf-8',
body=to_bytes(text, 'utf-8'))
class SelectorList(_ParselSelector.selectorlist_cls, object_ref):
"""
The :class:`SelectorList` class is a subclass of the builtin ``list``
class, which provides a few additional methods.
"""
class Selector(_ParselSelector, object_ref):
"""
An instance of :class:`Selector` is a wrapper over response to select
certain parts of its content.
``response`` is an :class:`~scrapy.http.HtmlResponse` or an
:class:`~scrapy.http.XmlResponse` object that will be used for selecting
and extracting data.
``text`` is a unicode string or utf-8 encoded text for cases when a