code: def unary_operator_to_python_name(op):
      return __unary_operator_to_python_name.get(op, None)
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
label_desc: Use image node_id 2 for calling a global function with example usage: unary_operator_to_python_name(op) and returns: __unary_operator_to_python_name