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
  
file_path: catboost/contrib/tools/python/src/Lib/idlelib/idle_test/test_grep.py
imports: import unittest
  from test.test_support import captured_stdout, findfile
  from idlelib.idle_test.mock_tk import Var
  from idlelib.GrepDialog import GrepDialog
  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