The role of the python crawler: 1. The python crawler can crawl valuable information on the website according to the rules; 2. The python crawler can be used to crawl the information and download it locally.
The operating environment of this article: Windows 7 system, Dell G3 computer, python version 3.6.4.
What does python crawler mean? What is the use of python crawler? Some newbies who have just started using python may not be very familiar with these issues. The editor below will sort out the python crawlers for you. I hope it will be helpful to you.
1: What does python crawler mean?
Python is a program implemented in multiple languages. Crawlers are also called web robots, and some people call them ants. Python can follow rules To crawl all valuable information on the website and save it locally. In fact, many crawlers are developed using python.
2: What is the use of python crawler? What can a crawler do?
A web crawler is a program that can capture all data on the Internet, such as pictures and text videos on websites. As long as we can access the data, we can use python crawler Go to grab and download to local.
3: How to learn crawlers
Before learning crawlers, we must first learn a language. The general recommendation is to learn Python. Python can be cross-platform. Compared with other languages, Python’s crawler library is relatively rich. The second step is to learn HTML knowledge, packet capture and other related knowledge, and understand the crawler knowledge system. When learning, you must first start with the basics. After learning the basics, then use the framework. In fact, a better way is to practice in practice.
Four: The simple principle of crawler
First get the url, put the url in the queue, wait for crawling, and then parse the dns to get the host's IP, you can download the website and save it locally.
The above is a complete introduction to the use of python crawlers. If you want to know more about Python tutorial, please pay attention to the php Chinese website.
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