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This article introduces the knowledge of "what is the architecture of Python crawler?". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

What is a Python crawler?

Reptiles, also known as web crawlers, can be understood as spiders crawling on the web, the Internet is a huge network, crawlers are walking on the network of reptiles, encounter their favorite food, will grab down, grab network resources.

So is it difficult to learn Python crawlers?

Python itself is a relatively simple programming language, suitable for zero basic personnel, more suitable for beginners, low threshold and powerful function. In fact, Python crawler is a relatively simple course inside, and it is not very difficult to learn. To put it simply, as long as the data you can see on the network can be crawled, most crawlers are achieved by sending requests-getting pages-parsing pages-extracting and storing content. In fact, they are used to obtain web page information.

The architecture of Python crawler consists of:

1. URL manager: manages the url collection to be crawled and the crawled url collection, and transmits the url to be crawled to the web downloader

two。 Web page downloader: crawl the web page corresponding to url, store it as a string, and send it to the web page parser

3. Web page parser: parses valuable data, stores it, and complements url to URL manager.

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