'Return all access points sorted based on signal strength
:param self: An AccessPointFinder object
:type self: AccessPointFinder
:return: None
:rtype: None'

def get_sorted_access_points(self):

    sorted_access_points = sorted(self._observed_access_points, key=(lambda ap: ap.get_signal_strength()), reverse=True)
    return sorted_access_points
