code: def filter(self, data):
      return float(data)
  
imports: from __future__ import absolute_import, print_function, division
  from copy import deepcopy
  import unittest
  import numpy
  import theano
  from theano.gof import graph
  from theano.gof.graph import Variable, Apply, Constant
  from theano.gof.type import Type
  from theano.gof.op import Op
  from theano.gof import fg
  from theano.gof.link import PerformLinker, WrapLinker, Container
  from theano.compat import cmp
label_desc: Use image node_id 1 for calling the TDouble obj's underlying member method code with example usage: obj.filter(data) and returns: float