code: def _line_is_hyphens(line):
      """Returns whether the line is entirely hyphens (and not blank)."""
      return line and not line.strip("-")
  
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 23 for calling a global function with example usage: _line_is_hyphens(line) and returns: unknown