code: def isidentifier(s):
      return (
          keyword.iskeyword(s)
          or re.match(r"^[_a-zA-Z][_a-zA-Z0-9]*$", s) is not None
      )
  
file_path: datashader/datashader/datashape/internal_utils.py
imports: from __future__ import print_function, division, absolute_import
  import keyword
  import re
label_desc: Use image node_id 5 for calling a global function with example usage: isidentifier(s) and returns: unknown