What is a python crawler
According to the script characteristics of python, python is easy to configure and the processing of characters is also very flexible. In addition, python has many crawling modules, so python is also called a crawler.
The operating environment of this article: Windows 7 system, Dell G3 computer, python version 3.6.4.
What does python crawler mean? Why is python called a crawler? I believe many people don’t know much about python crawlers. Let’s talk about what python crawlers are?
What is a crawler?
We compare the valuable information on the Internet to a large spider web, and each node is the stored data, and the spiders on the spider web are compared to crawlers, and crawlers can automatically crawl the Internet The information program grabs all valuable information from the Internet, crawls the images returned by the site's HTML and JS locally, and stores them for easy use.
Why is python called a crawler?
Many people don’t know why python is called crawler. This may be due to the pace characteristics of python. python is easy to configure and the processing of characters is also very flexible. In addition, python has a lot of crawling capabilities. Take the module, so python is also called a crawler.
What is the composition of a crawler?
The structure of the Python crawler is mainly composed of five parts: scheduler, web page parser, web page selector, url manager, and program.
The process of crawler?
First, send a request, then obtain the response content, parse the content, and finally save the data, thus completing a crawl.
The above is the complete explanation of what python crawler is. If you want to know more about Python video tutorial, please pay attention to php Chinese website.
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