發布 Python 模組
****************

Email:
   distutils-sig@python.org

As a popular open source development project, Python has an active
supporting community of contributors and users that also make their
software available for other Python developers to use under open
source license terms.

This allows Python users to share and collaborate effectively,
benefiting from the solutions others have already created to common
(and sometimes even rare!) problems, as well as potentially
contributing their own solutions to the common pool.

This guide covers the distribution part of the process. For a guide to
installing other Python projects, refer to the installation guide.

備註: For corporate and other institutional users, be aware that
  many organisations have their own policies around using and
  contributing to open source software. Please take such policies into
  account when making use of the distribution and installation tools
  provided with Python.


Key terms
=========

* the Python Packaging Index is a public repository of open source
  licensed packages made available for use by other Python users

* Python Packaging Authority 是负责标准打包工具以及相关元数据和文件
  格 式标准维护与改进的开发人员和文档作者团队。 他们基于 GitHub 和
  Bitbucket 这两个平台维护着各种工具、文档和问题追踪系统。

* "distutils" is the original build and distribution system first
  added to the Python standard library in 1998. While direct use of
  "distutils" is being phased out, it still laid the foundation for
  the current packaging and distribution infrastructure, and it not
  only remains part of the standard library, but its name lives on in
  other ways (such as the name of the mailing list used to coordinate
  Python packaging standards development).

* setuptools is a (largely) drop-in replacement for "distutils"
  first published in 2004. Its most notable addition over the
  unmodified "distutils" tools was the ability to declare dependencies
  on other packages. It is currently recommended as a more regularly
  updated alternative to "distutils" that offers consistent support
  for more recent packaging standards across a wide range of Python
  versions.

* wheel (in this context) is a project that adds the "bdist_wheel"
  command to "distutils"/setuptools. This produces a cross platform
  binary packaging format (called "wheels" or "wheel files" and
  defined in **PEP 427**) that allows Python libraries, even those
  including binary extensions, to be installed on a system without
  needing to be built locally.


Open source licensing and collaboration
=======================================

In most parts of the world, software is automatically covered by
copyright. This means that other developers require explicit
permission to copy, use, modify and redistribute the software.

Open source licensing is a way of explicitly granting such permission
in a relatively consistent way, allowing developers to share and
collaborate efficiently by making common solutions to various problems
freely available. This leaves many developers free to spend more time
focusing on the problems that are relatively unique to their specific
situation.

The distribution tools provided with Python are designed to make it
reasonably straightforward for developers to make their own
contributions back to that common pool of software if they choose to
do so.

The same distribution tools can also be used to distribute software
within an organisation, regardless of whether that software is
published as open source software or not.


Installing the tools
====================

The standard library does not include build tools that support modern
Python packaging standards, as the core development team has found
that it is important to have standard tools that work consistently,
even on older versions of Python.

The currently recommended build and distribution tools can be
installed by invoking the "pip" module at the command line:

   python -m pip install setuptools wheel twine

備註: For POSIX users (including Mac OS X and Linux users), these
  instructions assume the use of a *virtual environment*.For Windows
  users, these instructions assume that the option to adjust the
  system PATH environment variable was selected when installing
  Python.

The Python Packaging User Guide includes more details on the currently
recommended tools.


阅读Python包用户指南
====================

“Python包装用户指南”介绍了创建和发布项目所涉及的各个关键步骤和元素：

* Project structure

* Building and packaging the project

* Uploading the project to the Python Packaging Index


How do I...?
============

These are quick answers or links for some common tasks.


... choose a name for my project?
---------------------------------

This isn't an easy topic, but here are a few tips:

* check the Python Packaging Index to see if the name is already in
  use

* 检查流行的托管网站如 GitHub，Bitbucket 等等，看是否已有一个该名称
  的 项目

* check what comes up in a web search for the name you're
  considering

* avoid particularly common words, especially ones with multiple
  meanings, as they can make it difficult for users to find your
  software when searching for it


... create and distribute binary extensions?
--------------------------------------------

This is actually quite a complex topic, with a variety of alternatives
available depending on exactly what you're aiming to achieve. See the
Python Packaging User Guide for more information and recommendations.

也參考: Python Packaging User Guide: Binary Extensions
