Python Basics
Python Basics

[Python001]Python3.7.3 installation (Win10)

... Luis
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Python Basics

[Python000] Python2.7.16 installation (Win10)

... Kendall
schedule5 min read
Python Basics

[BB Binn000] Anaconda is not a warm-blooded animal

... Alejandro
schedule9 min read
Python Basics

Use of Python urllib2 and urllib

There are many libraries in Python that can be used to simulate a browser sending a request to fetch webpages. This article introduces the use of urllib2 to obtain webpage data.urllib2 is in the Python2 standard library and can be used without installation. You cannot use urllib2 in Python3. In Python3, urllib2 is changed to urllib.request, so when the code in this article runs in Python3, replace urllib2 with urllib. request, the result is the same.One, use urllib2 to get data# coding=utf-8 imp

... Lincoln
schedule6 min read
Advanced Python
trending_up Advanced Python

SQL | SQL statement + grammar necessary for data analysis interview

... Avery
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trending_up Advanced Python

Python | 100 test questions, take you to play with the Numpy module!

... Jason
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trending_up Advanced Python

Python crawler advanced essential | A tutorial on ReRes

... Ayden
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Hard goods | Redis performance problem analysis

... Alejandro
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trending_up Advanced Python

Sorted out 34 Python open source frameworks that were blown up

... Avery
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trending_up Advanced Python

How to write a Python function

... Adrian
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Python Web Development
Python Web Development

Python | Python crawler crawling knowledge summary

Article Source:http://blog.csdn.net/qq_37267015/article/details/62217899Recently I learned a little web crawler and realized some functions of using Python to crawl Zhihu. Here is a small summary. Web crawlers are programs or scripts that automatically grab some information from the Internet through certain rules. We know that machine learning and data mining start from a large amount of data to find some valuable and regular things, and crawlers can help us solve the problem of difficult data a

... Noah
schedule 9 min read
Python Web Development

If you have time for BB, why not think about how to make others shut up?

1.After the last time " SKR! Tiger fights 660,000 JRS against 33 million Wu Yifan guards, don't force me to use Python ", I found that there are many JRs in the audience. "This is a slam dunk" must be no stranger.I'm not advertising, so I won't discuss the commentary on the show for the time being. Today I want to talk about another thing outside the stadium. In the game last week, Jeremy Lin's team, J-Team, after being behind by more than 20 points, again counterattacked and won the final victo

... Ruby
schedule 6 min read
Python Web Development

Python | Pipenv官方推荐的python包管理工具

Pipenv - 官方推荐的的python包管理工具。 Pipenv是一款旨在将所有包管理工具（如bundler, composer, npm, cargo, yarn等）的优点集中应用于python领域中的工具。它对各个平台都有很好的支持。它可以为你的项目自动创建和管理虚拟环境，并且在你安装/删除包时自动在Pipfile中添加/移除相应的包。它同时生成一个非常重要的Pipfile.lock文件，来保证所构建环境的确定性。Pipenv想要解决的问题是多方面的: 你不需要再分别使用pip和virtualenv，在Pipenv中他们一起工作管理一个requirements.txt文件会产生很多问题，所以Pipenv用后面会出现的Pipfile和Pipfile.lock将其代替，这在实际例子中效果会更好。为了安全性，哈希在多处被使用。自动公开安全漏洞。让你通过图形深入了解当前的依赖关系（$ pipenv graph）通过加载 .env 文件简化开发流程安装Windows环境：$ pip install pipenvIf you are using macOS, you can use Hom

... Max
schedule 2 min read
Machine Learning
Machine Learning

Java basic notes 22

22.01_IO stream (sequence stream)1. What is sequence flow The sequence stream can integrate multiple byte input streams into one.When reading data from the sequence stream, it will start reading from the first stream to be integrated, and continue to read the second after reading one, and so on.2. How to use Integrate two: SequenceInputStream(InputStream, InputStream) FileInputStream fis1 = new FileInputStream("a.txt"); //Create an input stream object and associate a.txt FileInputStream fis2 = n

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Machine Learning

Shortcut keys for Jupyter Notebook

Jupyter Notebook has two keyboard input modes. Edit mode allows you to type code or text into the cell; at this time, the cell border is green. In command mode, the keyboard enters the command to run the program; at this time, the unit frame is gray.Command mode (press Esc to turn on)Enter  : switch to edit modeShift-Enter  : Run this unit, select the next unitCtrl-Enter  : Run this unitAlt-Enter  : Run this unit and insert a new unit under itY  : Unit transfer to code s

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Machine Learning

Java basic notes 19

19.01_ Exception (Overview and Classification of Exception)A: Overview of the exception Exceptions are errors that occur during the running of a Java program.B: Abnormal classification View Throwable via APIError Server down, database crash, etc.Exception C: exception inheritance systemThrowable ErrorException RuntimeException19.02_Exceptions (how the JVM handles exceptions by default)A: How does the JVM handle exceptions by default When the main function receives this problem, there are two way

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Machine Learning

Java Basic Notes 08

08.01_Object Orientation (Overview and Classification of Code Blocks)A: Overview of code blocks In Java, the code enclosed in {} is called a code block.B: Code block classification According to its location and declaration, it can be divided into local code blocks, structured code blocks, static code blocks, and synchronized code blocks (multi-threaded explanation).C: Application of common code blocks a: partial code block Appear in the method; limit the variable life cycle, release early, and i

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Machine Learning

Java basic notes 09

09.01_Object Orientation (Overview of Polymorphism and Its Code Embodiment)A: Overview of polymorphism Many forms of thingsB: Polymorphic premise a: There must be an inheritance relationship.b: There must be a way to rewrite.c: There must be a parent class reference pointing to a child class object.C: Case demonstration Code embodies polymorphism09.02_Object Orientation (Features of Member Access in Polymorphism)A: Member access characteristics in polymorphism a: member variable Look at the left

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Machine Learning

Java basic notes 12

12.01_Common objects (Scanner overview and method introduction)A: Overview of Scanner B: Scanner's construction method principle Scanner(InputStream source)There is a static field under the System class: public static final InputStream in; Standard input stream, corresponding to keyboard input. C: General method hasNextXxx() Determines whether there is another input item, where Xxx can be Int, Double, etc. If you need to determine whether to include the next string, you can omit XxxnextXxx() Get

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Machine Learning

Java basic notes 11

11.01_Java development tools (introduction to common development tools)A: Notepad software that comes with the operating systemB: Advanced notepad softwareC: Integrated Development Environment IDE (Integrated Development Environment)D: The difference between Eclipse and MyEclipse a: Eclipse is an extensible and open source IDE.b: Eclipse feature description freeWritten in pure Java languageFree installationStrong scalabilityc:MyEclipse Functional plug-ins added on the basis of Eclipse, charge fo

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