(self)
Return ``y`` coordinate of south-western corner.
Return ``y`` coordinate of south-western corner.
Return y coordinate of south - western corner .
def ay(self):
        """Return ``y`` coordinate of south-western corner. """
        if not self.conj:
            return self.a[1]
        else:
            return -self.b[1]
def ay ( self ) : if not self . conj : return self . a [ 1 ] else : return - self . b [ 1 ]