code: def signature(name, *args):
      strings = [name]
      for arg in args:
          if isinstance(arg, lib.dtype):
              strings.append(lib.dtype2name[arg])
          else:
              strings.append(str(arg))
      return "_".join(strings)
  
file_path: graphvite/python/graphvite/helper.py
imports: from __future__ import absolute_import, print_function
  import re
  from .None import lib
label_desc: Use image node_id 1 for calling a global function with example usage: signature(name) and returns: str