'Set the label position (left or right)
ACCEPTS: [ \'left\' | \'right\' ]'

def set_label_position(self, position):

    self.label.set_rotation_mode(u'anchor')
    self.label.set_horizontalalignment(u'center')
    if (position == u'left'):
        self.label.set_verticalalignment(u'bottom')
    elif (position == u'right'):
        self.label.set_verticalalignment(u'top')
    else:
        msg = u"Position    accepts    only    [    'left'    |    'right'    ]"
        raise ValueError(msg)
    self.label_position = position
    self.stale = True
