What can reptiles do?

Crawlers can do the following four things:

1. Collecting data: Python crawler can be used to collect data, which is the most direct and common method. Because the crawler program is a program, the program runs very fast and will not feel tired because of repeated things, so it is very simple and fast to obtain a large amount of data by using the crawler program.

2. Data storage: Python crawler can store the data collected from various websites into the original page database. The page data is exactly the same as the HTML obtained by the user's browser. Note: Search engine spiders also do some duplicate content detection when crawling pages. Once they encounter a lot of plagiarized, collected or copied content on websites with low access rights, they are likely to stop crawling.

3. Web page preprocessing: Python crawler can preprocess the pages crawled back by the crawler. Such as text extraction, Chinese word segmentation, denoising, index processing, special word processing and so on.

4. Providing retrieval service and website ranking: Python crawler provides keyword retrieval service for users after organizing and processing information, and displays information related to user retrieval to users. At the same time, websites can be ranked according to the PageRank value of the page, so that websites with high ranking values will rank high in the search results. Of course, you can also buy the ranking of search engine websites directly with money. If you are interested, click here to study for free.

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