code: def plotXYCatalog(self, **kwargs):
          
          try:
              from matplotlib import pyplot as pl
          except:
              pl = None
  
          if pl is not None:
              pl.clf()
              pl.plot(self.xypos[0],self.xypos[1],**kwargs)
docs: Plots the source catalog positions using matplotlib's `pyplot.plot()`
  
          Plotting `kwargs` that can also be passed include any keywords understood
          by matplotlib's `pyplot.plot()` function such as::
  
              vmin, vmax, cmap, marker