'Init 3D axes; overrides creation of regular X/Y axes'

def _init_axis(self):

    self.w_xaxis = axis3d.XAxis(u'x', self.xy_viewLim.intervalx, self.xy_dataLim.intervalx, self)
    self.xaxis = self.w_xaxis
    self.w_yaxis = axis3d.YAxis(u'y', self.xy_viewLim.intervaly, self.xy_dataLim.intervaly, self)
    self.yaxis = self.w_yaxis
    self.w_zaxis = axis3d.ZAxis(u'z', self.zz_viewLim.intervalx, self.zz_dataLim.intervalx, self)
    self.zaxis = self.w_zaxis
    for ax in (self.xaxis, self.yaxis, self.zaxis):
        ax.init3d()
