原文: PyCoder's Weekly - Issue #359

• 用 PEP 8 撰写真正 Pythonic 代码
  • REAL PYTHON video

Learn how to write high-quality, readable code by using the Python style guidelines laid out in PEP 8. Following these guidelines helps you make a great impression when sharing your work with potential employers and team mates. Learn how to make your code PEP 8 compliant with these bite-sized lessons.

(是也乎:

没那么简单, 团队习惯兼容的配置又能有用, 太难 )

• 在Python中实施单一责任原则(SRP)
  • NIKITA SOBOLEV

The Single Responsibility Principle (or SRP) is an important concept in software development. The main idea of this concept is: all pieces of software must have only a single responsibility. Nikita's article guides you through the complex process of writing simple code with some hands-on refactoring examples. You'll use callable classes, SRP, dependency injection, and composition to write simple Python code. Nice read!

(是也乎:

Python 是个橡皮泥, 嘦愿意, 总是能嗯哼成喜欢的样子...

)

• 如何使用测试 CI 和代码覆盖率设置 Python 项目以取得成功
  • JEFF HALE

How to add tests, CI, code coverage, and more. Very detailed writeup.

(是也乎:

非常详细...以致难以简单的向团队交付...

Install Black
Create .pycache
Install pytest
Create Tests
Sign up for Travis CI and Configure
Create .travis.yaml
Test Travis CI
Add Code Coverage
Add Coveralls
Add PyUp

看起来步骤不多...但是,,,,

)

• 用 Python 和 OpenCV 检测真/假面孔
  • ADRIAN ROSEBROCK

Learn how to detect liveness with OpenCV, Deep Learning, and Keras. You'll learn how to detect fake faces and perform anti-face spoofing in face recognition systems with OpenCV.

• 用 pyenv 管理多个 Python 版本
  • REAL PYTHON

In this step-by-step tutorial, you'll learn how to install multiple Python versions and switch between them with ease, including project-specific virtual environments, even if you don't have sudo access with pyenv.

(是也乎:

其实 PyEnv 比 pipenv 灵活就在, 不仅仅是将运行时版本进行了管理, 而且可以简便的将 Python 版本环境, 工程模块依赖环境, 在本地自由结合到任意工程目录上.

就是缺少一个一键将当前环境所有依赖模块冻结为压缩文件, 并能简洁的传送到远方主机, 一键完成再安装配置的工具...

毕竟, 总是有些模块是依赖外部 GCC 之类工具现场编译的.

)

• 2005 年以来 Python 包的增长
  • PYDIST.COM

"The Python ecosystem has been steadily growing [since 2005]. After the first few years of hyper growth as PyPI gained near-full adoption in the Python community, the number of packages actively developed each year—meaning they had at least one release or new distribution uploaded—has increased 28% to 48% every year."

(是也乎:

每年 28%~48% 的增长, 比中国 GDP 高, 但是远远小于 node.js 的.

)

讨论

Discussions

• Loop 和 "Else" 条款
  • PYTHON.ORG

"What is the Pythonic way to handle the situation where if a condition exists the loop should be executed, but if it does not something else should be done?"

• 登录: admin 口令: admin
  • TWITTER.COM/REALPYTHON

(是也乎:

核武器的...

)

• Python 之禅 源码完全违反了 Python 之禅
  • REDDIT

"I was clicking around in PyCharm and noticed that the this module in CPython violates basically all of these principles."

文章,教程和嗯哼

Articles, Tutorials and Talks

• 嫑令丫的可调用
  • MOSHE ZADKA

You can make any Python object callable by adding a call method to it. Like operator overloading this seems like a nifty idea at first... but is it really? Moshe's article goes over some use cases and examples to discuss whether making objects callable is a good idea or not.

• Python Pandas: 使用内/外/左侧/右侧 连接来合并数据帧
  • THISPOINTER.COM

How to merge different Dataframes into a single dataframe using Pandas' DataFrame.merge() function. Merging is a big topic, so this part focuses on merging dataframes using common columns as Join Key and joining using Inner Join, Right Join, Left Join and Outer Join.

(是也乎:

可以说又是一个比喻用错喻体导致的常见嗯哼...

)

• 用 Python 介绍神经网络
  • VICTOR ZHOU

A simple explanation of how neural networks work and how to implement one from scratch in Python. Nice illustrations!

(是也乎:

华人? Princeton University 19 级...

还是大堆公式, 以及相似的图谱, 并没减少理解难度...

)

• 向 Python 导入任何东西
  • ALEKSEY BILOGUR • Shared by Aleksey Bilogur

An intro to module loaders and finders so you can "hack" Python's import system for fun and profit.

(是也乎:

有毒

)

• Poetry 和 Packagr 的私有 Python 包管理
  • CHRISTOPHER DAVIES

(是也乎:

叕一个模块管理机制...可以说当年 老爹 没想明白的事儿, 至今也没人整明白.

)

• 我在一周内学会了 Python 并且只对 Sorta 感到后悔

  • MEZEROTM.COM

• 为什么你想要 Python 有显示依赖注入

  • GITHUB.COM/DOBIASD

"In other languages, e.g., Java, explicit dependency injection is part of daily business. Python projects however very rarely make use of this technique. I'd like to make a case for why it might be useful to rethink this approach."

• 理解并改进 Conda 的表现
  • ANACONDA.COM

Update from the Conda team regarding Conda's speed, what they're working on, and what performance improvements are coming down the pike.

(是也乎:

不同 Jupter 全力在分布式 web 界面上支持多种语言, Conda 找到了自己的发展道路 -> 在本地运行时环境上 给开发者 一致性体验.

)

• Python 用 Doc2Vec 检测句子相似性
  • KANOKI.ORG

Using Python to estimate the similarity of two text documents using the Doc2Vec module.

• Iterating with Simplicity: Evolving a Django app with Intercooler.js
  • ADAM STEPINSKI

好物

Interesting Projects, Tools and Libraries

• ctyped: 用类型提示为共享库构建 Ctypes 接口

  • GITHUB.COM/IDLESIGN • Shared by Juan Rodriguez

• iodide-project/pyodide: 在浏览器中 WASM 上运行 CPython

  • GITHUB.COM/IODIDE-PROJECT

And not just that, it's a full Python scientific stack, compiled to WebAssembly for running in the browser. More info here.

(是也乎:

构建失败中... )

• Pyckitup: 在WebAssembly上运行的Python游戏引擎

  • PICKITUP247.COM

• PEP 8 Speaks: GitHub Integration for Python Code Style

  • PEP8SPEAKS.COM

A GitHub app to automatically review Python code style over Pull Requests.

(是也乎:

绝对是 M$ 有銭任性而追加的嗯哼...

)

• ArchiveBox: 开源自托管 Web 存档
  • GITHUB.COM/PIRATE

(是也乎:

依赖: wget, chromium, and youtube-dl )

• minik: 无服务器世界的 Web 框架
  • GITHUB.COM/EABGLOBAL • Shared by PythonistaCafe

(是也乎:

非常 Bottle

)

📆🐍 活动/大会

Events

• ⋅ Python Atlanta
  • March 14, 2019 USA
• ⋅ Karlsruhe Python User Group (KaPy)
  • March 15, 2019 卡尔斯鲁厄 德国
• ⋅ Django Girls Rivers 2019 Workshop
  • March 15 to March 17, 2019 河上?
• ⋅ PyCon Odessa
  • March 17, 2019 敖德萨 乌克兰
• ⋅ PyCon SK 2019
  • March 22 to March 25, 2019 布拉迪斯拉发 斯洛伐克

DAMA

❤️ Happy Pythonic!

(大妈私人无责任播报)

是也乎

• 190313 Zoom.Quiet(大妈) 用时 42 分钟 完成快译
• 190313 Zoom.Quiet(大妈) 用时 17 分钟 完成格式转抄.