code: def get_new_variadic_symbol():
      global k_num_internal_syms
      s = Symbol("*is" + str(k_num_internal_syms))
      k_num_internal_syms += 1
      return s
  
imports: from __future__ import print_function
  from __future__ import division
  from __future__ import absolute_import
  import logging
  import numpy
  import sympy
  from .None import types
  from .block import Function
  from .var import Var
  from .types.symbolic import k_used_symbols, k_num_internal_syms
  from coremltools.converters.mil.input_types import InputType
label_desc: Use image node_id 1 for calling a global function with example usage: get_new_variadic_symbol() and returns: s