content: import sys
  
  from matplotlib import pyplot
  import numpy
  
  sys.path.insert(0, '/Library/Application Support/MWorks/Scripting/Python')
  from mworks.data import MWKFile
  
  
  def selection_counts(filename):
      with MWKFile(filename) as f:
          r_codec = f.reverse_codec
          red_code = r_codec['red_selected']
          green_code = r_codec['green_selected']
          blue_code = r_codec['blue_selected']
  
          red_count = 0
          green_count = 0
          blue_count = 0
  
          for evt in f.get_events_iter(codes=[red_code, green_code, blue_code]):
              if evt.data:
                  if evt.code == red_code:
                      red_count += 1
                  elif evt.code == green_code:
                      green_count += 1
                  else:
                      assert evt.code == blue_code
                      blue_count += 1
  
          index = numpy.arange(3)
          pyplot.bar(index,
                     [red_count, green_count, blue_count],
                     0.5,
                     color = ['r', 'g', 'b'],
                     align = 'center')
          pyplot.xticks(index, ['Red', 'Green', 'Blue'])
          pyplot.title('Selection Counts')
          pyplot.show()
  
  
  if __name__ == '__main__':
      selection_counts(sys.argv[1])
  