python - 什么是 Python 蛋？

Question

我是 Python 新手，我只是想了解它的包是如何工作的。大概 eggs 是某种包装机制，但什么是它们所扮演角色的快速概述，可能是关于它们为什么有用以及如何创建它们的一些信息？

Answer 1

Note: Egg packaging has been superseded by Wheel packaging.

与Java中的.jar文件的概念相同，它是一个.zip文件，其中一些元数据文件重命名为.egg，用于分发代码作为包。

Specifically: The Internal Structure of Python Eggs

A "Python egg" is a logical structure embodying the release of a specific version of a Python project, comprising its code, resources, and metadata. There are multiple formats that can be used to physically encode a Python egg, and others can be developed. However, a key principle of Python eggs is that they should be discoverable and importable. That is, it should be possible for a Python application to easily and efficiently find out what eggs are present on a system, and to ensure that the desired eggs' contents are importable.

The .egg format is well-suited to distribution and the easy uninstallation or upgrades of code, since the project is essentially self-contained within a single directory or file, unmingled with any other projects' code or resources. It also makes it possible to have multiple versions of a project simultaneously installed, such that individual programs can select the versions they wish to use.