code: def _reverser(f):
      def freversed(x):
          return f(1 - x)
  
      return freversed
  
imports: from __future__ import absolute_import, division, print_function, unicode_literals
  import six
  import numpy
  from numpy import ma
  import matplotlib
  import matplotlib.colors
  import matplotlib.cbook
  from matplotlib._cm import datad
  from matplotlib._cm_listed import cmaps
label_desc: Use image node_id 1 for calling a global function with example usage: _reverser(f) and returns: freversed, f