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原文: Import Python Weekly Newsletter - Issue No 101 欢迎, 来 PyChina/weekly 共同翻译/增订/推荐 周刊 蠎消息 ;-) 该读 ~ 文章, Blog, 教程… Quiz Results quiz Thanks everyone for participating in the quiz. Nico Ekkart, Chad Heyne, Artem Bezukladichnii, Andrew Nester and Kyle Monson Congrats. Your copies of Writing Idiomatic Python is on its way. The Answers are on the blog post. ImportPython Subscribers can get a copy of Writing Idiomatic Python for a special price at https://jeffknupp.com/writing-idiomatic-python-ebook-importpython-q2vwt5/ . Thank you Jeff. (是也乎: 上次的问卷结果出来了… ) 俺们如何部署 Python 代码 ? - Nylas deployment Building, packaging, and deploying Python using versioned artifacts in Debian packages. At Nylas, we’ve developed a better way to deploy Python code along with its dependencies, resulting in lightweight packages that can be easily installed, upgraded, or removed. And we’ve done it without transitioning our entire stack to a system like Docker, CoreOS, or fully-baked AMIs. (是也乎: 老梗了,两年前就推荐过,这团队折腾到最后使用了 Debian 专用的 dh-virtualenv 工具, 对于多数团队而言,嗯哼的… ) 如何进行代码格式化令你的 Python 出色? code-quality In Python code reviews I’ve seen over and over that it can be tough for developers to format their Python code in a consistent way: extra whitespace, irregular indentation, and other “sloppiness” then often leads to actual bugs in the program. Luckily automated tools can help with this common problem. Code linters make sure your Python code is always formatted consistently – and their benefits go way beyond that. (是也乎: Flake8+Sublime 的培训课程广告 ) 在 Python 中检查所有条件匹配 - By Trey Hunner core-python Use of any/all with generator expressions for improved readability and code clarity. (是也乎: 运用内建函式 any/all ) 如何成为对冲基金的 Python 程序猿, by the CTO of AHL interview We asked Collier what it takes to code in Python for a major quant fund. – And whether learning how to code as a second career after trading is actually viable. This is what he said. (是也乎: AHL?! 折腾宇宙奥密的 CTO 也转行基金了!? 突然理解了 洪教授… ) 计算科学和工程的 Python 3 book It’s a free book available for download. This text summarises a number of core ideas relevant to Computational Engineering and Scientific Computing using Python. The emphasis is on introducing some basic Python (programming) concepts that are relevant for numerical algorithms. The later chapters touch upon numerical libraries such as numpy and scipy each of which deserves much more space than provided here. We aim to enable the reader to learn independently how to use other functionality of these libraries using the available documentation (online and through the packages itself). (是也乎: 免费图书,用 py3 来演示计算科学领域中各种常见任务的解决, 也介绍了 numpy/scipy 等等关键库. ) Django, fast: part 2 django In this second follow-up post Patryk Zawadzki makes use of wrk benchmarking tool and shows us the performance of gunicorn, uwsgi, PyPy. Besides benchmarking there is good insights into do’s and don’t of each deployment option. (是也乎: 用标准的基准工具来测量 Django 的效能瓶颈 ) Python 内存管理 memory management One of the things you should know, or at least get a good feel about, is the sizes of basic Python objects. Another thing is how Python manages its memory internally. (是也乎: 其实吧,看中国原创的 Python 源代码鉴赏 更加能明白 ) Python 和虚拟环境 virtual environment A tour/tutorial of everything virtualenv. (是也乎: pyenv 早已是每天无法离开的命令了,当然, M$ 中嗯哼的. ) 聊哈对象 “优化”: slots 以及 namedtuples. performance 用 HTRC 特性提取器在 Python 中折腾文本挖掘 data mining We introduce a toolkit for working with the 13.6 million volume Extracted Features Dataset from the HathiTrust Research Center. You will learn how to peer at the words and trends of any book in the collection, while developing broadly useful Python data analysis skills. (是也乎: 基于 1360万卷文献资料的折腾… 可编程历史学 国外各种领域的研究,除了论文发布,关联的重要发布就是一个个的开放数据包. 细思恐极. 当然也使用 ipynb 来组织和展示. ) Awesome Django Admin django-admin Curated list of awesome django resources aptly named Awesome Django Admin . If you have seen Awesome Python, it’s on the same lines. Contribute to it. (是也乎: 细思恐极哪, Awesome 系列是 github 中实事上的好物集锦前缀, 但是, Django Admin 只是一个框架中的一个功能,竟然也能攒出一个 Awesome 来… 这得复杂到什么地步哪… ) 好物 ~ 包/模块/库/片段… ...

原文: Import Python Weekly Newsletter - Issue No 100 欢迎, 来 PyChina/weekly 共同翻译/增订/推荐 周刊 蠎消息 ;-) 该读 ~ 文章, Blog, 教程… 蠎加载百期知识竞赛 importpython It’s been 2 years of curating ImportPython and today is the 100th Issue. Wow. What a moment ?. Here is a python quiz competition. Five random() participants who answer all questions correctly win complete bundle of Writing Idiomatic python book by Jeff Knupp. If you take the quiz at the end of it is a link with discount too. This quiz is an our attempt at having fun and saying thanks to all you readers of ImportPython. Do take to twitter with the hashtag #importpython100 happy to hear what you have to say. (是也乎: 追查了一下, 2014-09-25 开始快译 蠎加载 的, 嗯哼,2012-02-17 开始翻译 蠎周刊 的, 当然 蠎周刊 之前有朋友翻译过前20期,俺是从 77 期开始坚持翻译到 200期,引人了新的快译小伙伴,老高, 然后,重心转移到 蠎加载; 风格也从之前正文的翻译,慢慢变成了主要进行 是也乎 的点评; 不变的是很少有人提交 PR,想来也是因为这种周刊,实在只是个定时 技术新闻点收集, 时效性太强,大家参与进来,并不能获得类似伟大的 字幕组 那种可以长期流传,洗脑天下的乐趣. 之于俺和小伙伴,最大的收获的确也就是: 定期翻译,形成周自学节奏 了解 Python 领域的主流变化 积累 Python 技术演化趋势概念 架构选型时帮助扩大思考范围 … 简单的说,定期快译一个技术新闻周刊,是种非常好的强迫自学的形式; 并不特别强烈的建议大家都来加入这种自学,毕竟太散了… 但是,的确是一个有效无意识提高领域技术语感的好形式. ) MLAlgorithms machine learning, algorithms Minimal and clean examples of machine learning algorithms 用 pip 从 github 安装 Python 模块 pip, github pip install --upgrade git+git://github.com/user/user_repository.git and you are done. (是也乎: 现代语言生态的标志行为:加载 github ) 迭代器和生成器 core-python Simple code snippets showing how iterators and generators work in Python. Patrick Kennedy: Flask 应用的单元测试 testing, flask This blog post provides an introduction to unit testing a Flask application. I’ve been on a big unit testing kick at work recently which is spilling over into updating the unit tests for my personal projects. Therefore, I thought it would be a good time to document the basics of unit testing a Flask application. (是也乎: 是的 Flask 的单元测试生态并没有兴起… ) DigitalOcean 中 Tensorflow 的 Python 支持 tensorflow, digitalocean The following steps will install TensorFlow1 on a fresh Digital Ocean virtual machine running Ubuntu. (是也乎: 数字海洋是唯一一个 AWS/GCP 之外最有成功相的 *aaS 厂商了 ) 用 Pandas 构建财务模型 - By Chris Moffitt pandas This specific post will discuss how to do financial modeling in pandas instead of Excel. For this example, I will build a simple amortization table in pandas and show how to model various outcomes. (是也乎: 谁说社科生不玩程序的?! 这在经济领域现在是必须的强项了… ) 定义过滤器和有序字典 django, python3 This week I ran into a minor problem that took a surprising amount of time to resolve. Getting a Django template to produce a dict in sorted order. While there were answers out there, none seemed to match the environment that I am using (python 3, Django 1.10). After some experimentation, I finally came up with what I think is a good solution. (是也乎: Django 中的模板看起来什么都能作,其实… ) 使用 BeautifulSoup 的 Web Scraping 教程 beautifulsoup In this tutorial, we’ll show you how to perform web scraping using Python 3 and the BeautifulSoup library. We’ll be scraping weather forecasts from the National Weather Service, and then analyzing them using the Pandas library. (是也乎: 国家天气局的数据抓取整理后给 美汤 分析. ) 在 Python 中构建动画 GIFs gif I first wrote a Python script to make a GIF illustration for any 5-unit color scheme. (是也乎: ) 如何通过 Pynini 在 Python 中获得卓越的文本分析能力 ? regex Regular expressions are the standard for string processing, but did you know you can often get better text untangling with Pynini’s finite-state transducers ? (是也乎: 利用 Pynini 的有限状态机来替代正则表达式来处理文本. ) CPython 内存管理 cpython This post is high level description of how CPython (just Python below) manages object life cycle. (是也乎: 在冯机框架之内, 执行效率总是得面对内存这一物理结构的额外问题 ) 针对 Python 3 的案例 python3 “There is high probability that Python 3 is such a failure it will kill Python” - Zed Shaw. As Curator of a Python Newsletter for 2+ years I can tell you at-least 20-30% of all articles I read of late have code written only for Python 3. Just recently I was at Pycon India and met lot of student who never wrote a single line in 2.x. Startup founders starting with new development choosing Python 3. Lot of people are sleeping on Python 3. A year more and hopefully everyone will be awake. (是也乎: 全球只有印度沉浸在 Py 3 的世界中..嗯哼,为什么?! 何况 Py 3 不是图灵完备的… ) 用 Python 进行研究 - 哈佛大学课程 - edx course, mooc Take your introductory knowledge of Python programming to the next level and learn how to use Python 3 for your research. You will learn Python 3 programming basics, Python tools (e.g., NumPy and SciPy modules) for research applications, How to apply Python research tools in practical settings. (是也乎: 介绍学界在 py 3 生态中如何进行研究 ) 在 Django 网站上水印图像 pillow, watermarking Have you ever noticed how stock photography sites add watermarks to the images shown on their catalogs ? They do that to make sure people don’t just take the free samples and use them without proper licensing. Turns out this is pretty easy to do it with Pillow. 元编程和 Django - 使用 Decorators django, decorators The article starts of with an introduction snippet to decorators and then goes on to explore some real world examples in context of Django. Personally one good find in the article was boltons library. JIRA 软件 Sponsor Start a free JIRA Software trial and get this shirt. (是也乎: 收购 bitbucekt.org 的靠谱软件管理开发商. ) 好物 ~ 包/模块/库/片段… ...

原文: Import Python Weekly Newsletter - Issue No 99 欢迎, 来 PyChina/weekly 共同翻译/增订/推荐 周刊 蠎消息 ;-) 该读 ~ 文章, Blog, 教程… 因长期运行而使用困难的数据如何激活在 Python core-python Jeff Knupp author of one of my favorite Python books “Writing Idiomatic Python” talks why Python is terrible for writing long-lived programs dealing with complicated data structures. He then goes to compare it with Go Programming languages where the datatype and data modeling has to be done before hand ( we are talking about complex nested data structures ) . Curator’s Note - If you are interested in golang do check out http://importgolang.com a weekly go programming newsletter. (是也乎: 当然的,和 golang 进行了对比,然后… ) Email API from SendGrid Sponsor Reliably deliver your emails with a quick and simple API or SMTP integration. Try for Free. Curator’s Note - Python and Django integration for sendgrid https://github.com/sendgrid/sendgrid-python and https://github.com/RyanBalfanz/django-sendgrid respectively. You can send 12,000 emails per month free. (是也乎: 一个实用的服务,值得关注的赞助商… 免费的话, 2K/月, 对小应用足够了 ) 用 Python 开发可扩展应用 scalability David Rodriguez attended the Udacity course: Developing Scalable Apps in Python - App Engine course and took these notes on building scalable apps. (是也乎: 可扩展应用本质上是个架构而不是语言问题… 当然,笔记在 docs.google 中,嗯哼. ) 用 Splinter 在 Python 中自动化 Web 测试 testing, automation Splinter is just an abstraction layer on top of Selenium and makes easy to write automation tests for web applications. This is a brief introduction to Splinter. (是也乎: 测试呢,最终还是得统一为 DSL, 当然,如果这个 DSL 和目标程序使用的相同,是最好的了. ) 命令行上的 HTTP 响应后端 code snippet httstat https://github.com/reorx/httpstat provides a HTTP response breakdown on command line. This saves you having to open up a browser and look at a visual network response waterfall. (是也乎: 目测是一个现成的无头浏览器的值守? ) 命令行上高速 Django 开发技巧 django David shares his list of command line alias for Django development. Curator’s note - Caution making alias for dot and double dot. keyboard opensource project Take full control of your keyboard with this small Python library. Hook global events, register hotkeys, simulate key presses and much more. (是也乎: PyHook 之后, 又一键盘控制模块,期望是跨平台兼容的…嗯哼,可怜的 M$ ) Monkey-patching 又一 Python 实例方案 core-python, monkey patching Dynamically adding or overwriting an instance method in Python is rarely needed, but it’s a good excuse to explore interesting aspects of the language that aren’t always well known: the descriptor protocol, types.MethodType and partial function applications. (是也乎: 猴补丁 ~ 方便了程序猿,逼死编译器的好物,令 Py 的加速大业又多一层壁垒 ) Django Model Managers django, models Model Managers (and custom QuerySets) are really useful. If you find yourself doing some complicated queryset logic over and over again, you can put that logic in one place and just refer to it with a simple name. (是也乎: 对于死也只用 SQL 的人来说,不存在哪… ) Django 在 instagram - Carl Meyer django, video Instagram operates at a scale unprecedented and is one of the largest users of Python/Django. In this video Carl talks about Django usage @instagram . What modification they made to Django and Why ?, How Django usage evolved over the years at instagram and more. 用 PyCharm 通过 SSH 工作在远程机器上 pycharm This article shows us the remote interpreter feature of PyCharm. Useful for those using PyCharm and want to execute scripts on a remove machine where the environment / data resides. (是也乎: 嗯哼,这样的界面,哪儿有心思写代码哪… ) 好物 ~ 包/模块/库/片段… ...

原文: Import Python Weekly Newsletter - Issue No 98 欢迎, 来 PyChina/weekly 共同翻译/增订/推荐 周刊 蠎消息 ;-) 该读 ~ 文章, Blog, 教程… Airflow 实用介绍 video, workflow engine Airflow is a popular pipeline orchestration tool for Python that allows users to configure complex (or simple!) multi-system workflows that are executed in parallel across any number of workers. A single pipeline might contain bash, Python, and SQL operations. With dependencies specified between tasks, Airflow knows which ones it can run in parallel and which ones must run after others. Airflow is written in Python and users can add their own operators with custom functionality, doing anything Python can do. (是也乎: 今年 PyCon 上出现的仙器,多后端/Pythonic 工作流/管道管理平台 ) Python 中时间测试的乐趣和收益 debug I was preparing to push some changes a couple of days ago and as I usually do, I ran the tests. I sat back in my chair as the dots raced across the screen when suddenly I noticed that one of the dots linger. ”OS is probably running some updates in the background or something” I said to myself, and ran the tests again just to be sure. I watched closely as the dots filled the screen and there it was again?—?I have a slow test! (是也乎: Matrix-样 数据观察形式看来是正确的 ) Become a pdb power-user pdb Good Tutorial on using pdb. (是也乎: ..It is not necessary to use pdb all the time 嗯哼,作者都说的很明白,其实大家都清楚,动用 pdb 的情景都是不得不作 接盘侠 时, 面对纠结在一起的代码时,不得不进行的刺探, 因为没有自信自己在看过所有代码,将思想扭曲为当初那位崩溃的程序猿相同状态后, 是否能恢复清明… ) 教程提案还有三周可以提交 pycon Talk proposals will be due on 2017 January 3.Poster proposals will be due on 2017 January 3.Tutorial proposals are due on 2017 November 30. Yes, that’s right — tutorial proposals are due in three weeks. awesome-asyncio async-io, curated list A curated list of awesome Python asyncio frameworks, libraries, software and resources. (是也乎: 是 github 带领中国程序猿重新认识了 awesome 这词儿, 现在最高效的领域技术搜索技巧就是在 github 中搜索 awesome+ 技术名 ) Some thoughts on asynchronous API design in a post-async/await world async-io I’ve recently been exploring the exciting new world of asynchronous I/O libraries in Python 3 – specifically asyncio and curio. These two libraries make some different design choices. This is an essay that I wrote to try to explain to myself what those differences are and why I think they matter, and distill some principles for designing event loop APIs and asynchronous libraries in Python. (是也乎: Py3 中内建的 asyncio 和 curio 成为两大焦点都在进行折腾… ) django-flat-responsive django An extension for Django admin that makes interface mobile friendly. 如何在 Python 中启动 Landsat 数据处理? google cloud Cloud Dataflow provides a fully-managed, autoscaling, serverless execution environment for data pipelines written in Apache Beam. In this article Lak Lakshmanan and Matt Hancher show us how to create a monthly vegetation index from Landsat images, available as a public dataset. (是也乎: GCP 中的 Cloud Dataflow 支持 Apache Beam 可以发布无主机数据处理流程… ) 好物 ~ 包/模块/库/片段… ...