py -- access restrictions

Inside the Class, there can be attributes and methods, while external code can operate data by directly calling the methods of instance variables. In this way, the internal complex logic is hidden. However, from the previous definition of Student class, external code can freely modify the name and score attributes of an instance: >>> b ...

Posted by immobilarity on Tue, 03 May 2022 08:06:31 +0300

Analyze what netizens of exciting offer2 are roast about?

Variety shows are not only a way to relax after a hard day, but also our talk after dinner. Looking at their favorite variety shows, time is beautiful enough. And "exciting offer" is a good variety choice. Some people say it makes me feel inferior, and I think it's very interesting. "Exciting offer" has been broadcast for t ...

Posted by dustbuster on Tue, 03 May 2022 03:38:30 +0300

Teach you how to use Python to send email easily

preface Now the pace of life is speeding up, and the communication methods between people are also very different. In order to facilitate communication, e-mail has been produced. As we all know, e-mail is actually the same as sending and receiving data on the client and server. It has a function of sending and receiving. The communication prot ...

Posted by phpprog on Tue, 03 May 2022 03:22:00 +0300

Django series official tutorial [2]Models and the admin site

Continuing from the first chapter, this chapter learns to set up the database, create models and introduce the backend that Django automatically generates. 1. Install the database Now open mysite/settings.py, this is Django's python model settings file. SQLite is used by default. If we are interested in Django, then this database is enough, ...

Posted by makoy on Tue, 03 May 2022 03:05:12 +0300

Python crawler technology -- Fundamentals -- functional programming (Part I)

summary Function is a kind of encapsulation supported by Python built-in. We can decompose complex tasks into simple tasks by disassembling large pieces of code into functions and calling functions layer by layer. This decomposition can be called process oriented programming. Function is the basic unit of process oriented programming. Functiona ...

Posted by sigmon on Mon, 02 May 2022 22:38:19 +0300

Conditional loop statements form the skeleton of Python code

Conditional control We all know that the flowchart has multiple branches, and the same is true in the program. In Python, the if statement is used to determine which branch the program should take. Its execution process is as follows: The code execution process is as follows: if The general form of an if statement is as follows: if condition_ ...

Posted by alexislalas on Mon, 02 May 2022 21:26:39 +0300

python uses werobot to process pictures in the development of wechat official account

python uses werobot to process pictures in the development of wechat official account preface Xiaobai, I am interested in studying the development of python wechat official account recently. There are many tutorials about server configuration, which will not be released here for the time being (I planned to do intranet penetration myself, bu ...

Posted by why not on Mon, 02 May 2022 15:42:06 +0300

[authoritative guide to hadoop 4th Edition] Chapter IV IO of hadoop [notes + code]

4.1 data integrity The common method to detect damaged data is to calculate the checksum of the data when entering the system for the first time. If the newly generated checksum after transmission does not completely match the original checksum, the data will be considered damaged. Note that the checksum may be wrong and the data is correct, ...

Posted by flash99 on Mon, 02 May 2022 12:03:14 +0300

[dynamic programming] python solves the N queen problem (20 lines of code)

[dynamic programming] python solves the N queen problem (20 lines of code) If the reader doesn't know much about the idea and solution of backtracking algorithm, you can click the link to check my previous blog post< Detailed explanation of [backtracking algorithm] of algorithm >, it introduces the solution ideas and methods of backtrack ...

Posted by swedee on Mon, 02 May 2022 09:40:04 +0300

python crawler: crawl the takeout data of a picture. This article is enough

The text and pictures of this article come from the Internet and are only for learning and communication. They do not have any commercial use. The copyright belongs to the original author. If you have any questions, please contact us in time for handling The following article comes from Tencent cloud Author: Python advanced (want to learn ...

Posted by mrMarcus on Mon, 02 May 2022 05:01:06 +0300