what do you mean it doesn't help? it outlines all the methods.
code:
import _winreg
registry = _winreg.ConnectRegistry(None, _winreg.HKEY_CURRENT_USER)
key = _winreg.OpenKey(registry, r"Software\Paint.NET")
print _winreg.QueryValueEx(key, "ColorsForm.SnappedTo")
as specified in the documentation, you get a tuple back:
(u'appWorkspace', 1)
the first item being the value, the second the type (1 = REG_SZ).
if you need to do something more complicated like enumerate a key, then use the appropriate method on the page. I don't know how to help you when all the help you need is there.