Fixed SIM115 (open-file-with-context-handler): Use a context manager for opening files

management/mail_log.py

@@ -72,7 +72,7 @@ def scan_files(collector):
         if not os.path.exists(fn):
             continue
         if fn[-3:] == '.gz':
-            tmp_file = tempfile.NamedTemporaryFile()
+            with tempfile.NamedTemporaryFile(delete=False) as tmp_file:
                 with gzip.open(fn, 'rb') as f:
                     shutil.copyfileobj(f, tmp_file)