Scrapy-101
- 2. Scrapy is a fast open source web crawling framework written in Python, used to extract the data from web page with the help of selectors based on XPath.
- 3. Beautiful Soup Lxml Newspaper
- 4. It is easier to build and scale large crawling projects. It has built-in mechanism called Selectors, for extracting the data from websites. It handles the requests asynchronously and it is fast. It automatically adjusts crawling speed using Auto-throttling mechanism. Ensures developer accessibility.
- 5. Scrapy is an open source and free to use web crawling framework. Scrapy generates feed exports in formats like JSON, CSV, and XML. Scrapy has built-in support for selecting and extracting data from sources either by XPath or CSS expressions. Scrapy based on crawler, allows extracting data from web pages in an automatic way.
- 6. Scrapy is easily extensible, fast and powerful. It is a cross platform application framework (Windows, Linux, Mac OS and BSD). Scrapy requests are scheduled and processed asynchronously. Scrapy comes with built-in service called Scrapyd which allows to upload projects and control spiders using JSON web service. It is possible to scrap any website, even if that website does not have API for raw data access.
- 7. You should have a basic understanding of Computer Programming terminologies and Python. A basic understanding of XPATH is a plus.
- 9. The command to install scrapy is -: pip install scrapy
- 13. Command to run the spider is:- scrapy runspider <spider.py> Or scrapy runspider <spider.py> -o file.(json/xml/csv)
- 15. Scrapy is only for Python 2.7. + Installation is different for different operating system.
- 16. http://www.slideshare.net/previa/scrapyford ummies-15277988 https://www.tutorialspoint.com/scrapy/scrap y_overview.htm https://www.scrapy.org/