This method generates the GPS waypoints in a
instance as a sequence of
Because these waypoints are stored in sequence in the
._gpsList attribute, we need only return an iterator
that visits the elements of that list, because an iterator is
also a generate that generates the values in the structure
over which it is iterating.
# - - - L o c . g e n G p s def genGps(self): """Generate the waypoints in self. """ return iter(self._gpsList)