code: def add_one_func(x):
      return x + 1.0
  
imports: from zoo.common.nncontext import *
  from zoo.pipeline.api.autograd import *
  from zoo.pipeline.api.keras.layers import *
  from zoo.pipeline.api.keras.models import *
  from optparse import OptionParser
label_desc: Use image node_id 2 for calling a global function with example usage: add_one_func(x) and returns: unknown