Scrapy 2.4 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) • Robust encoding support and auto-detection, for dealing with foreign css('title') [] The result of running response.css('title') is a list-like object called SelectorList, which represents a list thing is that the result of calling .getall() is a list: it is possible that a selector returns more than one result, so we extract them all. When you know you just want the first result, as in this case 0 码力 | 354 页 | 1.39 MB | 1 年前3Scrapy 2.3 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) • Robust encoding support and auto-detection, for dealing with foreign css('title') [] The result of running response.css('title') is a list-like object called SelectorList, which represents a list thing is that the result of calling .getall() is a list: it is possible that a selector returns more than one result, so we extract them all. When you know you just want the first result, as in this case 0 码力 | 352 页 | 1.36 MB | 1 年前3Scrapy 0.22 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) • A media pipeline for automatically downloading images (or any other iterable containing any of them. process_results(response, results) This method is called for each result (item or request) returned by the spider, and it’s intended to perform any last time processing required Scrapy Documentation, Release 0.22.0 xpath(query) Find nodes matching the xpath query and return the result as a SelectorList instance with all ele- ments flattened. List elements implement Selector interface0 码力 | 199 页 | 926.97 KB | 1 年前3Scrapy 2.6 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) • Robust encoding support and auto-detection, for dealing with foreign css('title') [] The result of running response.css('title') is a list-like object called SelectorList, which represents a list thing is that the result of calling .getall() is a list: it is possible that a selector returns more than one result, so we extract them all. When you know you just want the first result, as in this case 0 码力 | 384 页 | 1.63 MB | 1 年前3Scrapy 2.5 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) • Robust encoding support and auto-detection, for dealing with foreign css('title') [] The result of running response.css('title') is a list-like object called SelectorList, which represents a list thing is that the result of calling .getall() is a list: it is possible that a selector returns more than one result, so we extract them all. When you know you just want the first result, as in this case 0 码力 | 366 页 | 1.56 MB | 1 年前3Scrapy 0.16 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) 2.1. Scrapy at a glance 7 Scrapy Documentation, Release 0.16.5 • iterable containing any of them. process_results(response, results) This method is called for each result (item or request) returned by the spider, and it’s intended to perform any last time processing required this XPathSelector and return a list of XPathSelector objects (ie. a XPathSelectorList) with the result. xpath is a string containing the XPath to apply re(regex) Apply the given regex and return a0 码力 | 203 页 | 931.99 KB | 1 年前3Scrapy 0.18 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) 2.1. Scrapy at a glance 7 Scrapy Documentation, Release 0.18.4 • iterable containing any of them. process_results(response, results) This method is called for each result (item or request) returned by the spider, and it’s intended to perform any last time processing required this XPathSelector and return a list of XPathSelector objects (ie. a XPathSelectorList) with the result. xpath is a string containing the XPath to apply re(regex) Apply the given regex and return a0 码力 | 201 页 | 929.55 KB | 1 年前3Scrapy 0.20 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) 2.1. Scrapy at a glance 7 Scrapy Documentation, Release 0.20.2 • iterable containing any of them. process_results(response, results) This method is called for each result (item or request) returned by the spider, and it’s intended to perform any last time processing required forced and no detection will occur. xpath(query) Find nodes matching the xpath query and return the result as a SelectorList instance with all ele- ments flattened. List elements implement Selector interface0 码力 | 197 页 | 917.28 KB | 1 年前3Scrapy 1.3 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) • Robust encoding support and auto-detection, for dealing with foreign css('title') [] The result of running response.css('title') is a list-like object called SelectorList, which represents a list Scrape'] The other thing is that the result of calling .extract() is a list, because we’re dealing with an instance of SelectorList. When you know you just want the first result, as in this case, you can do: 0 码力 | 272 页 | 1.11 MB | 1 年前3Scrapy 1.2 Documentation
support for generating feed exports in multiple formats (JSON, CSV, XML) and storing them in multiple backends (FTP, S3, local filesystem) • Robust encoding support and auto-detection, for dealing with foreign css('title') [] The result of running response.css('title') is a list-like object called SelectorList, which represents a list Scrape'] The other thing is that the result of calling .extract() is a list, because we’re dealing with an instance of SelectorList. When you know you just want the first result, as in this case, you can do: 0 码力 | 266 页 | 1.10 MB | 1 年前3
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