/usr/lib/python2.7/idlelib/idle_test/ is in idle-python2.7 2.7.15~rc1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python2.7/idlelib/idle_test/README.txt
/usr/lib/python2.7/idlelib/idle_test/__init__.py
/usr/lib/python2.7/idlelib/idle_test/htest.py
/usr/lib/python2.7/idlelib/idle_test/mock_idle.py
/usr/lib/python2.7/idlelib/idle_test/mock_tk.py
/usr/lib/python2.7/idlelib/idle_test/test_autocomplete.py
/usr/lib/python2.7/idlelib/idle_test/test_autoexpand.py
/usr/lib/python2.7/idlelib/idle_test/test_calltips.py
/usr/lib/python2.7/idlelib/idle_test/test_config_name.py
/usr/lib/python2.7/idlelib/idle_test/test_configdialog.py
/usr/lib/python2.7/idlelib/idle_test/test_delegator.py
/usr/lib/python2.7/idlelib/idle_test/test_editmenu.py
/usr/lib/python2.7/idlelib/idle_test/test_formatparagraph.py
/usr/lib/python2.7/idlelib/idle_test/test_grep.py
/usr/lib/python2.7/idlelib/idle_test/test_helpabout.py
/usr/lib/python2.7/idlelib/idle_test/test_hyperparser.py
/usr/lib/python2.7/idlelib/idle_test/test_idlehistory.py
/usr/lib/python2.7/idlelib/idle_test/test_io.py
/usr/lib/python2.7/idlelib/idle_test/test_parenmatch.py
/usr/lib/python2.7/idlelib/idle_test/test_pathbrowser.py
/usr/lib/python2.7/idlelib/idle_test/test_rstrip.py
/usr/lib/python2.7/idlelib/idle_test/test_searchdialogbase.py
/usr/lib/python2.7/idlelib/idle_test/test_searchengine.py
/usr/lib/python2.7/idlelib/idle_test/test_text.py
/usr/lib/python2.7/idlelib/idle_test/test_textview.py
/usr/lib/python2.7/idlelib/idle_test/test_warning.py
/usr/lib/python2.7/idlelib/idle_test/test_widgetredir.py