text: import ROOT,sys
  
  k=ROOT.larcv.Image2D(20,20)
  k.paint(0)
  for x in xrange(20):
      for y in xrange(20):
          v=0
          if x==y: v=1
          k.set_pixel(x,y,v)
          print v,
      print
  print
  
  j=ROOT.larcv.as_ndarray(k)
  
  for x in xrange(len(j)):
      for y in xrange(len(j[x])):
          print int(j[x][y]),
      print
  print
      
  for x in xrange(k.meta().cols()):
      for y in xrange(k.meta().rows()):
          print k.pixel(x,y),
      print
  print
  
  import matplotlib.pyplot as plt
  
  img=plt.imshow(j)
  img.write_png('aho.png')
  sys.stdin.readline()
  