Scrapy 1.0 Documentation__init__.py ... Defining our Item Items are containers that will be loaded with the scraped data; they work like simple Python dicts. While you can use plain Python dicts with Scrapy, Items provide additional split("/")[-2] + '.html' with open(filename, 'wb') as f: f.write(response.body) Crawling To put our spider to work, go to the project’s top level directory and run: scrapy crawl dmoz This command runs the spider pages using only CSS selectors. However, XPath offers more power because besides navigating the structure, it can also look at the content: you’re able to select things like: the link that contains the0 码力 | 244 页 | 1.05 MB | 1 年前3
Scrapy 1.6 Documentationversions which Scrapy is tested against are: • Twisted 14.0 • lxml 3.4 • pyOpenSSL 0.14 Scrapy may work with older versions of these packages but it is not guaranteed it will continue working because it’s follow and creating new requests (Request) from them. How to run our spider To put our spider to work, go to the project’s top level directory and run: scrapy crawl quotes This command runs the spider running Scrapy shell from command-line, otherwise urls containing arguments (ie. & character) will not work. On Windows, use double quotes instead: scrapy shell "http://quotes.toscrape.com/page/1/" You will0 码力 | 295 页 | 1.18 MB | 1 年前3
Scrapy 1.0 Documentationextensions and middlewares to extend Scrapy functionality Signals See all available signals and how to work with them. Item Exporters Quickly export your scraped items to a file (XML, CSV, etc). All the ... Defining our Item Items are containers that will be loaded with the scraped data; they work like simple Python dicts. While you can use plain Python dicts with Scrapy, Items provide additional with open(filename, 'wb') as f: f.write(response.body) Crawling To put our spider to work, go to the project’s top level directory and run: scrapy crawl dmoz This command runs the spider0 码力 | 303 页 | 533.88 KB | 1 年前3
Scrapy 1.8 Documentationversions which Scrapy is tested against are: • Twisted 14.0 • lxml 3.4 • pyOpenSSL 0.14 Scrapy may work with older versions of these packages but it is not guaranteed it will continue working because it’s follow and creating new requests (Request) from them. How to run our spider To put our spider to work, go to the project’s top level directory and run: scrapy crawl quotes This command runs the spider running Scrapy shell from command-line, otherwise urls containing arguments (ie. & character) will not work. On Windows, use double quotes instead: scrapy shell "http://quotes.toscrape.com/page/1/" You will0 码力 | 335 页 | 1.44 MB | 1 年前3
Scrapy 1.2 Documentationversions which Scrapy is tested against are: • Twisted 14.0 • lxml 3.4 • pyOpenSSL 0.14 Scrapy may work with older versions of these packages but it is not guaranteed it will continue working because it’s follow and creating new requests (Request) from them. How to run our spider To put our spider to work, go to the project’s top level directory and run: scrapy crawl quotes This command runs the spider running Scrapy shell from command-line, otherwise urls containing arguments (ie. & character) will not work. On Windows, use double quotes instead: scrapy shell "http://quotes.toscrape.com/page/1/" You will0 码力 | 266 页 | 1.10 MB | 1 年前3
Scrapy 1.3 Documentationversions which Scrapy is tested against are: • Twisted 14.0 • lxml 3.4 • pyOpenSSL 0.14 Scrapy may work with older versions of these packages but it is not guaranteed it will continue working because it’s follow and creating new requests (Request) from them. How to run our spider To put our spider to work, go to the project’s top level directory and run: scrapy crawl quotes This command runs the spider running Scrapy shell from command-line, otherwise urls containing arguments (ie. & character) will not work. On Windows, use double quotes instead: scrapy shell "http://quotes.toscrape.com/page/1/" You will0 码力 | 272 页 | 1.11 MB | 1 年前3
Scrapy 0.12 Documentation12.0 2.3.2 Defining our Item Items are containers that will be loaded with the scraped data; they work like simple python dicts but they offer some additional features like providing default values. They response.url.split("/")[-2] open(filename, 'wb').write(response.body) Crawling To put our spider to work, go to the project’s top level directory and run: scrapy crawl dmoz.org The crawl dmoz.org command with a Response object. You can see selectors as objects that represent nodes in the document structure. So, the first instantiated selectors are associated to the root node, or the entire document.0 码力 | 177 页 | 806.90 KB | 1 年前3
Scrapy 0.12 Documentationto configure Scrapy and see all available settings. Signals See all available signals and how to work with them. Exceptions See all available exceptions and their meaning. Item Exporters Quickly export spiders. Defining our Item Items are containers that will be loaded with the scraped data; they work like simple python dicts but they offer some additional features like providing default values. They url.split("/")[-2] open(filename, 'wb').write(response.body) Crawling To put our spider to work, go to the project’s top level directory and run: scrapy crawl dmoz.org The crawl dmoz.org command0 码力 | 228 页 | 462.54 KB | 1 年前3
Scrapy 1.5 Documentationversions which Scrapy is tested against are: • Twisted 14.0 • lxml 3.4 • pyOpenSSL 0.14 Scrapy may work with older versions of these packages but it is not guaranteed it will continue working because it’s follow and creating new requests (Request) from them. How to run our spider To put our spider to work, go to the project’s top level directory and run: scrapy crawl quotes This command runs the spider running Scrapy shell from command-line, otherwise urls containing arguments (ie. & character) will not work. On Windows, use double quotes instead: scrapy shell "http://quotes.toscrape.com/page/1/" You will0 码力 | 285 页 | 1.17 MB | 1 年前3
Scrapy 0.22 Documentationspiders. 2.3.2 Defining our Item Items are containers that will be loaded with the scraped data; they work like simple python dicts but provide additional protecting against populating undeclared fields, to response.url.split("/")[-2] open(filename, ’wb’).write(response.body) Crawling To put our spider to work, go to the project’s top level directory and run: scrapy crawl dmoz The crawl dmoz command runs object as first argument. You can see selectors as objects that represent nodes in the document structure. So, the first instantiated selectors are associated to the root node, or the entire document.0 码力 | 199 页 | 926.97 KB | 1 年前3
共 62 条
- 1
- 2
- 3
- 4
- 5
- 6
- 7













