pydoc pathlib.Path shows the docstring of PurePath:

 |  PurePath represents a filesystem path and offers operations which
 |  don't imply any actual filesystem I/O.

But immediately after we see methods like chmod, exists and co which obviously aren’t pure.  Looking at the reST docs or the source code, the reader can deduce that this is the docstring of PurePath inherited by Path, but I find it confusing.

Solution: adding docstrings to all pathlib classes.  PurePath and Path can have all the info, Posix/Windows* subclasses only one line with a reference.