code: def colonize(msg, sep=": "):
      if not msg:
          return ""
      else:
          return msg + sep
  
imports: import difflib
  import io
  import numpy
  import onnx
  import onnx.helper
  import torch
  import torch.jit
  import torch.onnx
label_desc: Use image node_id 1 for calling a global function with example usage: colonize(msg, sep) and returns: str, unknown