text: from larcv import larcv
  import sys
  
  io=larcv.IOManager(larcv.IOManager.kREAD)
  
  io.configure(larcv.CreatePSetFromFile(sys.argv[1]))
  
  io.add_in_file(sys.argv[2])
  
  io.initialize()
  
  print
  
  for x in xrange(larcv.kProductUnknown):
  
      producers=io.producer_list(x)
  
      print 'Producer type:',x,'(aka',larcv.ProductName(x),')...'
      for p in producers: print p
      print
  
  