When using pythons pydoc or help command, Property accessors show the Property classes doc string instead of the instances function/blurb. For example:

from gi.repository import GObject
class Test(GObject.Object):
    @GObject.Property(type=int)
    def foo(self):
        """foo docstring."""
        return 1
    bar = GObject.Property(type=int, blurb='bar docstring.')

Test.bar.__doc__ == GObject.Property.__doc__  # True
Test.foo.__doc__ == GObject.Property.__doc__  # True


The above code shows the Property instances have the same doc string as the Property class which is a rather lengthy and unhelpful. Instances creation should clobber this with the callable getters docstring or explicit blurb.