code: def process(self, output, pstate):
      if output in pstate.memo:
          return pstate.memo[output]
      if output.name in greek:
          r = greek[output.name]
      else:
          r = str(output)
      pstate.memo[output] = r
      return r
  
imports: from __future__ import absolute_import, print_function, division
  from copy import copy
  import logging
  import os
  import sys
  import hashlib
  import numpy
  from six import string_types, integer_types, iteritems
  from six.moves import StringIO, reduce
  import theano
  from theano import gof
  from theano import config
  from theano.gof import Op, Apply
  from theano.compile import Function, debugmode, SharedVariable
label_desc: Use image node_id 1 for calling the LeafPrinter obj's underlying member method code with example usage: obj.process(output, pstate) and returns: r, pstate