old_contents: import matplotlib.cm as cmap
  import ColorMapWriter
  mpl_map = cmap.viridis(np.arange(256))
  c = ColorMapWriter.ColorMapWriter(mpl_map, 'viridis.xml', 5)
  c.createLookupTable()
new_contents: import matplotlib.cm as cmap
  import numpy as np
  import ColorMapWriter
  
  mpl_map = cmap.viridis(np.arange(256))
  c = ColorMapWriter.ColorMapWriter(mpl_map, 'viridis.xml', 5)
  c.createLookupTable()
  
subject: add numpy