如何在Python中创建名称空间包? [英] How to create namespace packages in Python?

问题描述

我有一个具有以下结构的Python 3项目:

I have a Python 3 project with the following structure:

project/
|
+--root/
   |
   +--__init__.py
   |
   +--sub/
      |
      +--__init__.py
      |
      +--actualcode.py

我想使用命名空间包"，以便我的库与单独项目中的其他相关库共享一个公共名称空间. import语句应如下所示:

I want to use "namespace packages" so that my lib shares a common namespace with other related libs in separate projects. The import statement should look like this:

from root.sub.actualcode import something

根文件夹中的__init__.py文件包含以下用于创建名称空间包的语句:

The __init__.py file in the root folder contains the following statement to create a namespace package:

from pkgutil import extend_path
__path__ = extend_path(__path__, __name__)

但是导入root.sub时我无法引用代码.它仅在我写时起作用:

But I cannot reference the code when I import root.sub. It works only when I write:

from sub.actualcode import something # doesn't work with "root.sub..."!

如何使用root作为命名空间?

What should I do to use root as a namespace?

推荐答案

可以使用分发.然后，诀窍是将以下行添加到setup的参数中:

Namespace packages can be built with distribute. The trick is then to add the following line to the parameter of setup:

setup(
  # ...
  namespace_packages  = ["root"]
)

问题中其余示例都是正确的.

The rest of the example in the question is correct.

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