What can crawler python do?

Can be used to: 1. Collect data; because the crawler program is a program and the program runs very fast, it becomes very simple and fast to use the crawler program to obtain a large amount of data. 2. Brush traffic and flash kills; when a crawler visits a website, if the website cannot identify that the access comes from a crawler, it may be regarded as a normal visit, thereby swiping the website's traffic.

Recommended learning: Python video tutorial

What can the python crawler be used for?

1. Collect data

Python crawler program can be used to collect data. This is also the most direct and commonly used method. Since a crawler is a program that runs very fast and does not get tired of doing repetitive things, it becomes very easy and fast to use a crawler to obtain large amounts of data.

Since more than 99% of websites are developed based on templates, using templates can quickly generate a large number of pages with the same layout and different content. Therefore, as long as a crawler is developed for one page, the crawler can also crawl content for different pages generated based on the same template.

2. Research

For example, you want to research an e-commerce company and want to know their product sales. The company claims monthly sales of hundreds of millions of dollars. If you use a crawler to crawl the sales of all products on a company's website, then you can calculate the company's actual total sales. Additionally, if you grab all the comments and analyze them, you can also find out if the site is being spammed. Data does not lie, especially massive data. Artificial falsification will always be different from what occurs naturally. In the past, it was very difficult to collect data with large amounts of data, but now with the help of crawlers, many deceptions will be nakedly exposed to the sun.

3. Brushing traffic and flash killing

Brushing traffic is a built-in function of the python crawler. When a crawler visits a website, if the crawler is well hidden and the website cannot recognize that the visit comes from a crawler, then it will be treated as a normal visit. As a result, the crawler "accidentally" swiped the website's traffic.

In addition to brushing up traffic, you can also participate in various flash sales activities, including but not limited to grabbing products, coupons, air tickets and train tickets on various e-commerce websites. Currently, many people on the Internet exclusively use crawlers to participate in various activities and make money from them. This behavior is generally called "wooling", and such people are called "wool partyers". However, the act of using crawlers to "scrounge wool" for profit is actually a legal gray area, and I hope you will not try it.

For more programming-related knowledge, please visit: Programming Teaching! !

The above is the detailed content of What can crawler python do?. For more information, please follow other related articles on the PHP Chinese website!