PyCoder

191204 Zoom.Quiet(大妈) 用时 42 分钟完成快译
191204 Zoom.Quiet(大妈) 用时 17 分钟完成格式转抄.

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Guido van Rossum 退出 Python 指导委员会
- PYTHON.ORG

“Part of my reason is that in the end, SC duty feels more like a chore to me than fun, and one of the things I’m trying to accomplish in my life post Dropbox retirement is to have more fun. To me, fun includes programming in and contributing to Python, for example the PEG parser project.”

(是也乎:

放弃争论, 清心编程...

)

Python Descriptors: 简介
- REAL PYTHON

Learn what Python descriptors are and how they’re used in Python’s internals. You’ll learn about the descriptor protocol and how the lookup chain works when you access an attribute. You’ll also see a few practical examples where Python descriptors can come in handy.

(是也乎:

Descriptors

配合装饰器才能发挥作用的描述符:

...能在类上拦截对实例属性的访问，由此可以引出很多有趣的用法，和metaclass结合起来更是如此。对于Python来说"性能"似乎从来不是牺牲"功能"(以及其他各种美德)的理由，这次也不例外。

zhihu 上有人点评...

)

PSF 周二筹款活动
- PYTHON.ORG

When you support the Python Software Foundation on Giving Tuesday you’l support organizations like the Cameroon Digital Skills Campaign. The global donatio drive runs for 24 hrs starting December 3.

PIP_REQUIRE_VIRTUALENV : 为 Pip 申请活动虚拟环境
- PYTHON-GUIDE.ORG

After setting the PIPREQUIREVIRTUALENV environment variable, Pip will no longer let you accidentally install packages if you are not in a virtual environment.

测试已安装的 Python 软件包
- PAUL GANSSLE

How to test Python packages as they will be installed on your users’ systems to avoid subtle bugs.

平展嵌套循环以提高并行处理速度
- S. LOTT

A functional programming pattern you can use to parallelize the processing of nested loops.

Django 3.0 发布
- DJANGOPROJECT.COM
PyCharm 2019.3 发布
- JETBRAINS.COM

讨论

Discussions

NIL

文章,教程和嗯哼

Articles, Tutorials and Talks

通过有损压缩减少 Pandas 内存用量
- ITAMAR TURNER-TRAURING

“If you want to process a large amount data with Pandas, there are various techniques you can use to reduce memory usage without changing your data. But what if that isn’t enough? What if you still need to reduce memory usage? Another technique you can try is lossy compression: drop some of your data in a way that doesn’t impact your final results too much.”

(是也乎:

嗯哼? 意思是精确性可以不要?

)

Pandas: 如何读写文件
- REAL PYTHON

In this tutorial, you’ll learn about the Pandas IO tools API and how you can use it to read and write files. You’ll use the Pandas read_csv() function to work with CSV files. You’ll also cover similar methods for efficiently working with Excel, CSV, JSON, HTML, SQL, pickle, and big data files.

(是也乎:

Pandas

饥饿的 Pandas 什么都能食

)

Python, Boto3, 和 AWS S3: Demystified
- REAL PYTHON

Get started working with Python, Boto3, and AWS S3. Learn how to create objects, upload them to S3, download their contents, and change their attributes directly from your script, all while avoiding common pitfalls.

(是也乎:

Boto3