code: def PlotFactory(xChart, chart):
      
      try:
          PlotCls = {
              qn('c:areaChart'):     AreaPlot,
              qn('c:area3DChart'):   Area3DPlot,
              qn('c:barChart'):      BarPlot,
              qn('c:bubbleChart'):   BubblePlot,
              qn('c:doughnutChart'): DoughnutPlot,
              qn('c:lineChart'):     LinePlot,
              qn('c:pieChart'):      PiePlot,
              qn('c:radarChart'):    RadarPlot,
              qn('c:scatterChart'):  XyPlot,
          }[xChart.tag]
      except KeyError:
          raise ValueError('unsupported plot type %s' % xChart.tag)
  
      return PlotCls(xChart, chart)
docs: Return an instance of the appropriate subclass of _BasePlot based on the
      tagname of *xChart*.