[py3] Replace filter/lambda by list comprehensions

This is more idiomatic and avoids returning a list on Python 2 and
an iterator on Python 3.

1 files changed, 2 insertions, 1 deletions

diff --git a/django/utils/autoreload.py b/django/utils/autoreload.py
index b6c055383c..9032cd024d 100644
--- a/django/utils/autoreload.py
+++ b/django/utils/autoreload.py
@@ -54,7 +54,8 @@ _win = (sys.platform == "win32")
 
 def code_changed():
     global _mtimes, _win
-    for filename in filter(lambda v: v, map(lambda m: getattr(m, "__file__", None), sys.modules.values())):
+    filenames = [getattr(m, "__file__", None) for m in sys.modules.values()]
+    for filename in filter(None, filenames):
         if filename.endswith(".pyc") or filename.endswith(".pyo"):
             filename = filename[:-1]
         if filename.endswith("$py.class"):