## 5.2.2 Which Docstrings Are Examined?

See docstring.py for all the details. They're unsurprising: the module docstring, and all function, class and method docstrings are searched, with the exception of docstrings attached to objects with private names. Objects imported into the module are not searched.

In addition, if `M.__test__` exists and "is true", it must be a dict, and each entry maps a (string) name to a function object, class object, or string. Function and class object docstrings found from `M.__test__` are searched even if the name is private, and strings are searched directly as if they were docstrings. In output, a key `K` in `M.__test__` appears with name

            <name of M>.__test__.K

Any classes found are recursively searched similarly, to test docstrings in their contained methods and nested classes. While private names reached from `M`'s globals are skipped, all names reached from `M.__test__` are searched.