["python","module"]
What does a leading . (dot, period) in an import statement in Python mean?

I'm looking over the code for Python's multiprocessing module, and it contains this line: from ._multiprocessing import win32, Connection, PipeConnection instead of from _multiprocessing import win32, Connection, PipeConnection the subtle difference being the period before _multiprocessing. What does that mean? Why the period?
That's the syntax for explicit relative imports. It means import from the current package.