原文: PyCoder's Weekly - Issue #366

• 如何充分利用 PyCon
  • REAL PYTHON

PyCon is about to kick off! Whether you're a first-timer or a seasoned attendee, this guide will help you get ready to have a great PyCon.

(是也乎:

简单说, 不一定要到现场, 认真复习一切就好

)

• 在 PyCharm PyCon Booth 上结识 Python 内容创建者
  • PAUL EVERITT

If you're at PyCon this week come and meet yours truly, along with Michael Kennedy from the Talk Python podcast, Brian Okken from Test & Code, Miguel Grinberg, Chris Medina, PyBites, and the Real Python Team. Be sure to stop by and say hi :)

• 用 PyGame Zero 教孩子编码
  • MATT LAYMAN

How can you excite a kid about computers? In this article the author shares his experience teaching his six year old son some programming using PyGame Zero.

(是也乎:

一样是游戏创作, PyGame 比 Scratch 要靠谱的多...

)

• 用计算机视觉检测帕金森病
  • ADRIAN ROSEBROCK

Learn how to use OpenCV and machine learning to automatically detect Parkinson's disease in hand-drawn images of spirals and waves.

(是也乎:

玩具级别...

)

• Mac Adware, à la Python
  • OBJECTIVE-SEE.COM

An examination of a malicious piece of macOS software (adware) which leverages Python and various levels of obfuscation to hinder analysis.

• 使用 Django 和 GeoDjango 制作基于位置的 Web 应用程序
  • REAL PYTHON video

Learn how to use Django and GeoDjango to build a location-based web application from scratch. You'll be building a simple nearby shops application that lists the shops closest to a user's location, powered by PostgreSQL and PostGIS.

(是也乎:

GeoDjango ~ Django 的特化道路将不会停止, 本质上已经从框架厂商, 变成方案厂商了.

)

讨论

Discussions

• repeatfunc() Itertools Recipe
  • RAYMOND HETTINGER

For example, repeatfunc(random, 10) would be a shortcut for (random() for i in range(10))

• 为毛这能出现在官方 Python 文档中?
  • REDDIT

"Lame Lame Lame, DO NOT USE THIS!!!"

(是也乎:

winreg — Windows registry access — Python 3.7.3 documentation

官方已经修正...

)

文章,教程和嗯哼

Articles, Tutorials and Talks

• 2019 PSF 年度报告
  • PYTHON.ORG

"Our first Annual Report shows you just a few ways the generous support from our partners and friends helps us support our mission"

• 使用 AST 在 Python 代码中检测 SQL 注入
  • ARTEM GOLUBIN

Python has a built-in ast module that lets you inspect, parse and edit Python code. This article shows a real-world example of how you can use this module to detect SQL injection vulnerabilities in Python code.

• Join a Community of 3.5 Million Developers on DigitalOcean
  • DIGITALOCEAN
  • sponsor

Discover why Python developers love self-hosting their apps on DigitalOcean, the simplest cloud platform. Get started with a $100 credit for new users →

(是也乎:

这个广告愿意放...

DigitalOcean 的文档是除 Heroku 之外最友好的了...

)

• Python 在 Netflix
  • AMJITH RAMANUJAM

A sampling of how Python is used at Netflix: "We use Python through the full content lifecycle, from deciding which content to fund all the way to operating the CDN that serves the final video to 148 million members."

(是也乎:

所以, Netflix 已经是比 豆瓣更大的单体 Python 应用了?

)

• 分发与发布: 为什么 Python 包很难嗯哼
  • ALEX BECKER
  • • Shared by Alex Becker

Why Python packaging is hard: just because you both installed v1.2.3, doesn't mean you installed the same thing...

(是也乎:

好问题...

)

• 了解 Python 3.7
  • CASEY FAIST

Short & sweet article that covers some of the new features and improvements available in Python 3.7: data classes, async/await, and more.

(是也乎:

叕一则 3.7 宣传文, 但是, 已经令和..不是, 马上 3.8 了...

)

• Python 在 Visual Studio Code: April 2019 Release
  • MICROSOFT.COM

Python interactive now comes with a built-in variable explorer, debugging is easier to configure, and improvements to the Python Language Server have been made.

(是也乎:

VSCode 终于完成了 IDE 化...

)

• Python KeyError 异常以及如何处理它们
  • REAL PYTHON

Learn how to handle Python KeyError exceptions. They are often caused by a bad key lookup in a dictionary, but there are a few other situations when a KeyError can be raised as well.

• Mercurial 版本控制入门
  • MOSHE ZADKA

Super short article to show you the basics of Mercurial, a distributed version control system written in Python.

(是也乎:

可怜的 Hg, 明明是 Python 官方推荐的哪... 可惜没有 github 类似明星平台... 虽然自己构建发布一个非常简单, 但是, 没了 社会化代码社交场景, VCS 就比较容宅寂了

)

• Top 3 Python Libraries for GraphQL
  • OBERT MATYSZEWSKI

A summary of the best Python libraries for the GraphQL query language.

(是也乎:

现在问题不在客户端吧...

)

• 用 Python-Powered Discord Bot 提供 GIF
  • MAX ONG ZONG BAO

(是也乎:

叕一则 gif 生成工具, discord 插件...

)

• 用 Python 创建自己的时序上下文管理器
  • FLORIAN DAHLITZ

Covers various ways to write a Python context manager that measures execution time.

• Python dis 模块和常量折叠
  • PYTHONTIPS.COM
  • • Shared by Jim Anderson

Why is pow(3, 89) slower than 3 ** 89? Quick article looking at the dis module and when CPython's constant folding kicks in.

好物

Interesting Projects, Tools and Libraries

• typed-json-dataclass: 增强型数据类
  • GITHUB.COM/ABATILO

Enhances dataclasses to perform basic type checking and makes the dataclass JSON serializable.

• Python 反编译器
  • PYTHON-DECOMPILER.COM

This free online tool can decompile Python bytecode (.pyc) back into equivalent Python source code.

(是也乎:

反正加密 Python 代码是个技术活

)

• pyflame: A ptrace -ing Profiler for Python
  • GITHUB.COM/UBER

(是也乎:

没什么可说的: 神器

uber 开源...

)

• pydockenv: Python 虚拟环境,但由Docker支持
  • GITHUB.COM/SE7ENTYSE7EN

(是也乎:

嗯哼, 从以往几十M , 要变成几百M 了? 真的是 SSD 时代思路了...

)

• pydantic: 使用 Python 类型提示进行数据验证和设置管理
  • HELPMANUAL.IO

(是也乎:

叕一种类型嗯哼的方案, 反正怎么用都是个累...

)

• stackprinter: 可调试友好跟踪
  • GITHUB.COM/CKND

(是也乎:

出时时, 调用桟更加可用的嗯哼...

File demo.py, line 10, in <module>
    8         somelist = [[1,2], [3,4]]
    9         anotherlist = [['5', 6]]
--> 10        dangerous_function(somelist + anotherlist)
    11    except:
    ..................................................
     somelist = [[1, 2], [3, 4]]
     anotherlist = [['5', 6]]
    ..................................................

File demo.py, line 4, in dangerous_function
    3     def dangerous_function(blub):
--> 4         return sorted(blub, key=lambda xs: sum(xs))
    ..................................................
     blub = [[1, 2], [3, 4], ['5', 6]]
    ..................................................

File demo.py, line 4, in <lambda>
    2
    3     def dangerous_function(blub):
--> 4         return sorted(blub, key=lambda xs: sum(xs))
    5
    ..................................................
     xs = ['5', 6]
    ..................................................

TypeError: unsupported operand type(s) for +: 'int' and 'str'

)

📆🐍 活动/大会

Events

• ⋅ PyCon US 2019

  • May 1 to May 10, 2019.
  • 10天...

• ⋅ Reunión Python Valencia

  • May 2, 2019

• ⋅ Canberra Python Meetup

  • 堪培拉
  • May 2, 2019

• ⋅ Sydney Python User Group (SyPy)

  • 澳洲
  • May 2, 2019

• ⋅ PyDays Vienna

  • 奥地利
  • May 3 to May 5, 2019

• ⋅ Python Atlanta Meetup

  • USA
  • May 9, 2019

DAMA

❤️ Happy Pythonic!

(大妈私人无责任播报)

• 蟒营 Python 入门班
  • 已开班, 进入 ch03
  • 下期可能 7月中
• [突发]Trio 作者质疑 Requests 作者 Kenneth Reitz 存在不当行为](https://mp.weixin.qq.com/s/5BWZYUvc5HXnvaqiawKBVA)

Jobs:

...

是也乎

• 190505 Zoom.Quiet(大妈) 用时 42 分钟 完成快译
• 190502 Zoom.Quiet(大妈) 用时 17 分钟 完成格式转抄.