No reason to use a generator here

Lib/test/test_import.py

@@ -15,16 +15,15 @@ from test.test_support import (unlink, TESTFN, unload, run_unittest, rmtree,
 from test import symlink_support
 from test import script_helper
 
-def _iter_files(name):
-    for f in (name + os.extsep + "py",
-              name + os.extsep + "pyc",
-              name + os.extsep + "pyo",
-              name + os.extsep + "pyw",
-              name + "$py.class"):
-        yield f
+def _files(name):
+    return (name + os.extsep + "py",
+            name + os.extsep + "pyc",
+            name + os.extsep + "pyo",
+            name + os.extsep + "pyw",
+            name + "$py.class")
 
 def chmod_files(name):
-    for f in _iter_files(name):
+    for f in _files(name):
         try:
             os.chmod(f, 0600)
         except OSError as exc:
@@ -32,7 +31,7 @@ def chmod_files(name):
                 raise
 
 def remove_files(name):
-    for f in _iter_files(name):
+    for f in _files(name):
         unlink(f)