code: def get_port_id(is_input, index):
      return "I_" + str(index) if is_input else "O_" + str(index)
  
imports: import html
  import json
  import warnings
  from graphviz import Digraph
  from graphviz import Source
  import tvm
label_desc: Use image node_id 5 for calling a global function with example usage: get_port_id(is_input, index) and returns: unknown