Financial data acquisition (2): Take the multi-process parallel highway

Summary: 1: This article will use multiple processes to transform a simple US stock crawler program; 2: There are many ways to create a process. This paper only uses the multiprocessing module to invoke objects to create a process. In addition, this paper discusses the efficiency and communication problems in the multi-process and shows the c ...

Posted on Thu, 23 Sep 2021 17:30:39 -0400 by commandonz

Using nodejs to build a simple and easy-to-use crawler

1, Initialize project npm init 2, Install required npm packages yarn add superagent cheerio Super simulates the browser to send requests, such as login https://www.npmjs.com/package/superagentCherio parsing static html https://www.npmjs.com/package/cheerio 3, Modify package.json script package.json "scripts": { "start": "node index.j ...

Posted on Tue, 21 Sep 2021 22:35:07 -0400 by pdub56

python crawls a fun Pavilion novel (2.0) and finishes 1600 chapters in ten minutes

1, Get free ip About free ip, I choose station uncle. Because free ip has a short lifetime, try to use real-time ip as much as possible. Here I use getip.py to obtain free ip. The code will crawl the latest 30 IPS and return them in the form of a dictionary, such as {http ':' ip '}, {https':' ip '} !!!!!! Here is another py file written, ...

Posted on Tue, 21 Sep 2021 18:37:02 -0400 by deltatango5

hear ❤️ Google Translate ❤️ Very good, so I used it ❤️ selenium in Python ❤️ Climb it down!!

hear ❤️ Google Translate ❤️ Very good, so I used it ❤️ selenium in Python ❤️ Climb it down!! 1, Demand analysis We know that there are many translation platforms on the Internet, such as Google translation, baidu translation, Youdao translation, Microsoft translation and so on. This time, we use selenium module to realize the crawling of ...

Posted on Tue, 21 Sep 2021 15:16:46 -0400 by DrAxeman

Write a CSDN hot list notification script in python, and don't miss your ranking changes ❤ Attached source code

❤️ This article is included in Learning python from actual combat Column, using python to realize practical cases in various directions such as crawler, office automation, data visualization and artificial intelligence, which is interesting and useful! ❤️ ⭐Click here to skip to the end Get source code and fan benefits Life has expectat ...

Posted on Mon, 20 Sep 2021 05:01:53 -0400 by swordske

Scapy Advanced for Python Crawlers (Passwords, Pictures, Middleware)

1 scrapy request pass-through 1.1 Reference Instructions Use scenarios: If crawling parsed data is not on the same page (deep crawling is required) In the crawler file, add a meta dictionary object to the function that needs to be callback Usage: When sending a request manually, a newly defined callback function needs to be passed in, and ...

Posted on Mon, 20 Sep 2021 00:28:17 -0400 by zildjohn01

python crawler multithreading

Multithreading Multi process The applications running in the system, such as opening the browser and pycham, are all applications that can run at the same time. An application is a process, and multiple are multiple processes. For example, the computer is stuck, but you can open the task manager to close the resource consuming applications. A ...

Posted on Sat, 18 Sep 2021 12:25:29 -0400 by bingo333

Teach you to write crawlers with. NET Core

Write in front Since the last project 58HouseSearch After migrating from. NET to. NET core, it took a month to officially launch to the new version. Then recently, a new pit was opened and a new one was built Dy2018Crawler Movie resources used to climb the movie paradise. Here also take the opportunity to briefly introduce how to write a ...

Posted on Sat, 18 Sep 2021 06:20:57 -0400 by jd023

Knot of the Day - 0916 Branches and Cycles Branches and Cycles

Python Basic Syntax - Branch and Loop 1. Process Control Sequential structure (default): Code is executed one at a time from top to bottom.Branch structure (if): When executing code, choose to execute a section of code based on the conditional results.Loop structure (for / while): repeat execution of a piece of code. Example 1.1.1: # Sequen ...

Posted on Thu, 16 Sep 2021 12:35:44 -0400 by tazdevil

Python crawler 9- form interaction and simulated Login

        catalogue 9.1 simulated Login 9.1.1Cookie overview 9.1.2 submitting cookies to simulate login 9.2 form interaction 9.2.1 post method 9.2.2 view web page source code submission form          Whether it is a simple web page or a web page using asynchronous loading technology, the web page i ...

Posted on Tue, 14 Sep 2021 14:50:52 -0400 by Pedro Sim