Scrapy 2.2 Documentationhtml', 'image4.html', 'image5.html'] Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when return None in which case the output of that function is ignored for further processing over the chain. This processor provides a convenient way to compose functions that only work with single values0 码力 | 348 页 | 1.35 MB | 1 年前3
Scrapy 2.4 DocumentationScrapy Documentation, Release 2.4.1 Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when used by default, but this can be changed with the request_cls attribute. If multiple contracts in chain have this attribute defined, the last one is used. Must return the same or a modified version of0 码力 | 354 页 | 1.39 MB | 1 年前3
Scrapy 2.3 Documentationhtml', 'image4.html', 'image5.html'] Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when used by default, but this can be changed with the request_cls attribute. If multiple contracts in chain have this attribute defined, the last one is used. Must return the same or a modified version of0 码力 | 352 页 | 1.36 MB | 1 年前3
Scrapy 1.7 Documentationhtml', 'image4.html', 'image5.html'] Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when return None in which case the output of that function is ignored for further processing over the chain. This processor provides a convenient way to compose functions that only work with single values0 码力 | 306 页 | 1.23 MB | 1 年前3
Scrapy 1.8 Documentationhtml', 'image4.html', 'image5.html'] Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when return None in which case the output of that function is ignored for further processing over the chain. This processor provides a convenient way to compose functions that only work with single values0 码力 | 335 页 | 1.44 MB | 1 年前3
Scrapy 2.10 DocumentationScrapy Documentation, Release 2.10.1 Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when used by default, but this can be changed with the request_cls attribute. If multiple contracts in chain have this attribute defined, the last one is used. Must return the same or a modified version of0 码力 | 419 页 | 1.73 MB | 1 年前3
Scrapy 2.7 DocumentationScrapy Documentation, Release 2.7.1 Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when used by default, but this can be changed with the request_cls attribute. If multiple contracts in chain have this attribute defined, the last one is used. Must return the same or a modified version of0 码力 | 401 页 | 1.67 MB | 1 年前3
Scrapy 2.9 Documentationhtml', 'image4.html', 'image5.html'] Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when used by default, but this can be changed with the request_cls attribute. If multiple contracts in chain have this attribute defined, the last one is used. Must return the same or a modified version of0 码力 | 409 页 | 1.70 MB | 1 年前3
Scrapy 2.8 DocumentationScrapy Documentation, Release 2.8.0 Note: See also: Selecting element attributes. Note: You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when used by default, but this can be changed with the request_cls attribute. If multiple contracts in chain have this attribute defined, the last one is used. Must return the same or a modified version of0 码力 | 405 页 | 1.69 MB | 1 年前3
Scrapy 2.2 Documentationhtml', 'image4.html', 'image5.html'] Note See also: Selecting element attributes. Note You cannot chain these pseudo-elements. But in practice it would not make much sense: text nodes do not have attributes different class name that shares the string someclass. As it turns out, Scrapy selectors allow you to chain selectors, so most of the time you can just select by class using CSS and then switch to XPath when return None in which case the output of that function is ignored for further processing over the chain. This processor provides a convenient way to compose functions that only work with single values0 码力 | 432 页 | 656.88 KB | 1 年前3
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