code: def _is_blank(line):
      return not line or line.isspace()
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import collections
  import enum
  import re
  import textwrap
label_desc: Use image node_id 3 for calling a global function with example usage: _is_blank(line) and returns: unknown