421-430¶
Issue #421 Python vs JavaScript, Python Dev Survey 2019 Results, CPython 3.8.3 Released, and More May 19, 2020¶
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Python vs JavaScript for Pythonistas
Python and JavaScript are two of the most popular programming languages in the world. In this tutorial, you’ll take a deep dive into the JavaScript ecosystem by comparing Python vs JavaScript. You’ll learn the jargon, language history, and best practices from a Pythonista’s perspective.
REAL PYTHON
卧槽 要不要这么专业，这么长谁看。图还挺好
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Python Caches Integers
Did you know that Python caches integers between -5 and 256? That is, these integer values are singletons, which means that any reference to one of them in your code references the same object in memory. Learn why Python does this and more in this short, but informative, article.
ARPIT BHAYANI
Python中的 整数不是传统的4字节 8字节的实现，因此没有大小限制，用起来贼爽，但是缺点就是肯定要花费额外的空间。为了避免常用的整数被频繁的请求分配空间，-5到256是提前分配的单例
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Call for Volunteers! Python GitHub Migration Work Group
The PSF is looking for volunteers to participate in a workgroup that will be involved with Python’s migration from bugs.python.org to GitHub.
PYTHON SOFTWARE FOUNDATION
1
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Python 3.9.0b1 Is Now Available for Testing
“Python 3.9 is still in development. This release, 3.9.0b1, is the first of four planned beta release previews. Beta release previews are intended to give the wider community the opportunity to test new features and bug fixes and to prepare their projects to support the new feature release.”
CPYTHON DEV BLOG
字符串去除前缀和后缀方法
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Why Do These Two Functions Have Different Output?
How well do you know how generator expressions and for loops work?
REDDIT
额
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Do You Use Walrus Operator := in Your Projects?
Do you walrus, coo coo ca choo?
REDDIT
新版本没人用永远是个大问题
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What is Python Redis? Enhance Python With Redis – the Fastest In-Memory Cloud Database
Install redis-py & Python Redis Client. Explore how Redis can enhance Python capabilities. Learn how to use Connection Pooling, SSL, Reading & Writing, & Opening a Connection with redis-py.
REDIS LABSSPONSOR
也太入门了，跟百度知道回答的差不多
Issue #422 Async Python Tips, The Hypermodern Python Dev Setup, Job Hunting in a Pandemic, and More May 26, 2020¶
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API Request Caching With Python & Redis
REDOWAN DELOWAR • Shared by Redowan Delowar
看完了又想学venv了
Issue #423 Python 3.9 PEPs, Dependency Mgmt & Injection, Python on the Raspberry Pi, and More June 2, 2020¶
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The PEPs of Python 3.9
The first Python 3.9 beta release is upon us! Learn what to expect in the final October release by taking a tour of the Python Enhancement Proposals (PEPs) that were accepted for Python 3.9.
JAKE EDGE
一些3.9的pep
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竟然没看懂是啥玩意
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How Often Do You Use Python’s pdb Debugger?
RAYMOND HETTINGER
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Stop Using datetime.now! (With Dependency Injection)
How do you test a function that relies on datetime.now() or date.today()? You could use libraries like FreezeGun or libfaketime, but not every project can afford the luxury of reaching for third-party solutions. Learn how dependency injection can help you write code that is more testable, maintainable, and practical.
HAKI BENITA
感觉说了跟没说一样，并没有说服我
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A Pythonic Guide to SOLID Design
DEREK DRUMMOND • Shared by Derek Drummond
- 单一原则：一个类或者方法只做一件事情
- 开闭原则：可以改变函数的进入参数，不要改变输出格式
- 里斯科夫的可替代性原则：子类可以替换父类而不破坏功能
- 接口隔离原则：搞多个父类来继承？..
- 依赖倒置原则：不依赖具体实现
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httpx: A Next Generation HTTP Client for Python
GITHUB.COM/ENCODE
requests的加强版，感觉应该学学异步了
Issue #424 Web Scraping Tools & Legality, How Async Should've Been, 90% Python Wheels Adoption, and More June 9, 2020¶
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Fastest Way to Flatten a List in Python
Explore six different was to flatten a list of lists in Python and how their performance compares. The fastest of the six methods mentioned might surprise you!
CHRIS CONLAN
一个测试
看来原地操作list效率比较高
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Classifying Values Based on Ranges That Contain Them
Avoid big if/else blocks by using the bisect module!
STACK OVERFLOW
bisect模块 https://stackoverflow.com/questions/30081275/why-is-1000000000000000-in-range1000000000000001-so-fast-in-python-3/ 回答里的这个也挺有意思
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Combining Flask and Vue
Learn about three ways to combine Flask and Vue, the pros and cons of each, and some guidelines for when to use each method.
JACE MEDLIN • Shared by Jace Medlin
海星
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pydantic: Data Parsing and Validation Using Python Type Hints
GITHUB.COM/SAMUELCOLVIN
star还挺多
Issue #425 Async Python Isn't Always Faster, Python Space Science, Generators, and More June 16, 2020¶
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How Do You Get the Count for Each Item in a List of Lists?
collections.Counter and itertools to the rescue!
STACK OVERFLOW
1
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How Does git Know What a Python Function/Class Definition Looks Like?
Hint: Regular expressions. Lots of them.
TWITTER.COM/SIMONW
正则吧
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Making Python Integers Iterable
You can’t loop over an integer in Python… unless you change the source code! Learn how to make integers iterable by altering the CPython source code. Also learn why this is a bad idea.
ARPIT BHAYANI
花里胡哨整了一大堆，然后说不建议这样搞。不过还是说明用Python还是要学会C
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newtdb: A Python Object-Oriented Database With JSONB-based Access and Search in PostgreSQL
GITHUB.COM/NEWTDB
数据库的东西
Issue #426 PEP 618 Accepted, Python vs COVID-19, "pickle" Flaws You Should Know About, and More June 23, 2020¶
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PEP 618 Accepted for Python 3.10: Add Optional Length-Checking to zip()
PEP 618, which adds a new strict parameter to the built-in zip() function that optionally enforces same-length iterables, has been accepted for Python 3.10. Read the acceptance letter here and some interesting discussion about the PEP on Reddit.
PYTHON.ORG
用的不多 不过确实很合理
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Draw With Your CPU (Code Golf)
Here’s a challenge: draw the word “MAIL” on your operating system CPU usage graph. Can you think of a simple way to do it with Python? Read on and get your mind blown with a fun round of code golf.
STACKEXCHANGE.COM
啥玩意
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PySimpleGUI: The Simple Way to Create a GUI With Python
In this step-by-step tutorial, you’ll learn how to create a cross-platform graphical user interface (GUI) using Python and PySimpleGUI. A graphical user interface is an application that has buttons, windows, and lots of other elements that the user can use to interact with your application.
REAL PYTHON
越来越觉得Python搞GUI不太靠谱，electeon不香嘛
Issue #427 Python-Powered Robot Dogs, What Is Core Python, Reducing Iterables, and More June 30, 2020¶
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PEP 622: Structural Pattern Matching
This PEP proposes adding pattern matching—a sort of enhanced switch statement—to the Python language. Read the PEP at the link above and follow the discussion on Reddit.
PYTHON.ORG
又有switch的pep了，这个看起来有点优雅，各种情况也说明的比较详细，看能不能通过吧
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What Is the Core of the Python Programming Language?
What makes Python… Python? Is it the language semantics? A set of features? What could you strip away and still have something you’d call Python? Everyone needs a little programming language existentialism now and then.
BRETT CANNON
还有拿rust写的Python解释器 https://github.com/RustPython/RustPython
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PEP 620: Hide Implementation Details From the C API
Author Victor Stinner argues that Python’s C API is too close to the CPython implementation, which limits available optimizations and hinders the addition of new features. PEP 622 proposes hiding implementation details from the C API.
PYTHON.ORG
对普通用户关系不大
Issue #428 Async Tribalism, "Wrong" Ways To Close a File, Django User Management, and More July 7, 2020¶
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Python 3.9.0b4 Is Now Ready for Testing
CPYTHON DEV BLOG
撒花
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What Is the Core of the Python Programming Language?
Last week we featured Brett Cannon’s article with the same title. Well, the post has generated quite a discussion on Hacker News.
HACKER NEWS
没啥用
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Why Do People Use .format() When f-Strings Exist?
f-Strings aren’t exactly a drop-in replacement for .format().
REDDIT
各有千秋吧 之前用format感觉也还行，就是后期修改参数有点僵硬
Issue #429 Return of the print Statement, 13 Python Project Ideas, How PyPy Works, and More July 14, 2020¶
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The (Non-)Return of the Python Print Statement
Guido van Rossum recently proposed re-introducing the Python print statement. He was completely serious and even though the idea didn’t gain traction, it’s interesting to know why he made the proposal.
JAKE EDGE
从Python2过来的改变
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A Beginner’s Guide to Robot Programming With Python
Get a crash course in programming autonomous robots with Python. Don’t have a robot laying around? No problem! Use this open-source simulator to get started.
NICK MCCREA
https://github.com/nmccrea/sobot-rimulator/tree/master，好像是个模拟器
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Python import: Advanced Techniques and Tips
The Python import system is as powerful as it is useful. In this in-depth tutorial, you’ll learn how to harness this power to improve the structure and maintainability of your code.
REAL PYTHON
Real Python的文章还是优秀
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Too Many Objects: Reducing Memory Overhead From Python Instances
Every Python object has a little bit of memory overhead, and that overhead can really add up if you need to create a huge number of instances. Find out where this overhead comes from and some strategies for reducing memory usage.
ITAMAR TURNER-TRAURING
俩方法，一个是slot，一个是别用对象换别的？但是这个例子（100W）只有在特别多的实例的时候才有意义
Issue #430 Pythonic OOP & Mixins, Removing PyPI Packages, Django 3.1, and More July 21, 2020¶
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Object-Oriented Programming (OOP) in Python 3
In this tutorial, you’ll learn all about object-oriented programming (OOP) in Python. You’ll learn the basics of the OOP paradigm and cover concepts like classes and inheritance. You’ll also see to how instantiate an object from a class.
REAL PYTHON
OOP
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10 Years of Flask: Conversation With Creator Armin Ronacher
Armin Ronacher is a guest on the Real Python Podcast to talk about the first 10 years of Flask. You’ll hear about the origins of Flask and the components that make up the framework. Armin also talks about what goes into documenting a framework or API, and the community working on the ongoing development of the Flask project.
REAL PYTHON PODCAST
音频 我擦
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Why You Shouldn’t Remove Your Package From PyPI
What to do if you need to deprecate a Python package that’s been published on the PyPI package repository.
GONÇALO VALÉRIO
跟自己关系不大
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Django 3.1 RC 1 Released
Django 3.1 release candidate 1 is the final opportunity for you to try out the potpourri of new features before Django 3.1 is released.
DJANGO SOFTWARE FOUNDATION
就一个发布消息，我还以为会有更新内容
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Python Developer (Remote)
SSI PEOPLE
应该学一下消息队列了