狮身人面像：类变量的"WARNING: py:class reference target not found"

Question

我有两个文件，foo.py和bar.py。

foo.py包含：

import bar

class B():
    a = bar.A

bar.py包含：

class A():
    pass

我正在docs/index.rst中通过生成这些文档

.. automodule:: bar
   :members:
   :undoc-members:
.. automodule:: foo
   :members:
   :undoc-members:

现在，当我使用nit pick标志（-n）运行build html时，我会得到以下内容，并发出警告：WARNING: py:class reference target not found: A:

(env)bash-3.2$ make html
sphinx-build -b html -d _build/doctrees  -n . _build/html
Running Sphinx v1.2.3
loading pickled environment... done
building [html]: targets for 1 source files that are out of date
updating environment: 0 added, 1 changed, 0 removed
reading sources... [100%] index
looking for now-outdated files... none found
pickling environment... done
checking consistency... done
preparing documents... done
writing output... [100%] index
/Users/caesarbautista/Desktop/test_docs/docs/index.rst:12: WARNING: py:class reference target not found: A
writing additional files... genindex py-modindex search
copying static files... done
copying extra files... done
dumping search index... done
dumping object inventory... done
build succeeded, 1 warning.
Build finished. The HTML pages are in _build/html.

如何修复此警告？

到目前为止，我已经尝试过在谷歌和文档中搜索，但没有成功。它也与如何导入A无关。我试过from bar import A，但没有成功。错误消息非常不透明。

我设置的测试项目的副本可以在这里找到。

Answer 1

在您的代码中，您有

class B():
    a = bar.A

您必须使用实例化而不是类别名。当我用a = bar.A() 替换a = bar.A时，警告刚刚消失