code: def is_valid_python(tkn: str) -> bool:
      
      try:
          root = ast.parse(tkn)
      except SyntaxError:
          return False
      return len(root.body) == 1 and isinstance(root.body[0], ast.Expr) and isinstance(root.body[0].value, ast.Name)
docs: Determine whether tkn is a valid python identifier
  
      :param tkn:
      :return: