code: def report(self, pat):
      _grep.engine._pat = pat
      with captured_stdout() as s:
          _grep.grep_it(re.compile(pat), __file__)
      lines = s.getvalue().split("\n")
      lines.pop()  # remove bogus '' after last \n
      return lines
  
imports: from idlelib import grep
  import unittest
  from test.support import captured_stdout
  from idlelib.idle_test.mock_tk import Var
  import os
  import re
label_desc: Use image node_id 1 for calling the Grep_itTest obj's underlying member method code with example usage: obj.report(pat) and returns: lines