diff --git a/ppdet/core/workspace.py b/ppdet/core/workspace.py
index c922b3b3cde39e3908c41446b2e5c9f4b231762d..64c0be1fcec9617072b1e60dca685ebb182139dd 100644
--- a/ppdet/core/workspace.py
+++ b/ppdet/core/workspace.py
@@ -59,7 +59,8 @@ def load_config(file_path):
     """
     _, ext = os.path.splitext(file_path)
     assert ext in ['.yml', '.yaml'], "only support yaml files for now"
-    merge_config(yaml.load(open(file_path), Loader=yaml.Loader))
+    with open(file_path) as f:
+        merge_config(yaml.load(f, Loader=yaml.Loader))
     return global_config
 
 
diff --git a/ppdet/data/data_feed.py b/ppdet/data/data_feed.py
index dd85e83fe13e9c05b24ff6d906d3ee549f0d624e..238b100671d289a63cec3d6c204ab09f05f08953 100644
--- a/ppdet/data/data_feed.py
+++ b/ppdet/data/data_feed.py
@@ -58,12 +58,6 @@ def _prepare_data_config(feed, args_path):
     mixup_epoch = -1
     if getattr(feed, 'mixup_epoch', None) is not None:
         mixup_epoch = feed.mixup_epoch
-    bufsize = 10
-    use_process = False
-    if getattr(feed, 'bufsize', None) is not None:
-        bufsize = feed.bufsize
-    if getattr(feed, 'use_process', None) is not None:
-        use_process = feed.use_process
 
     data_config = {
         'ANNO_FILE': feed.dataset.annotation,
@@ -96,6 +90,13 @@ def create_reader(feed, max_iter=0, args_path=None, my_source=None):
     # named `DATASET_DIR` (e.g., coco, pascal), if not present either, download
     data_config = _prepare_data_config(feed, args_path)
 
+    bufsize = 10
+    use_process = False
+    if getattr(feed, 'bufsize', None) is not None:
+        bufsize = feed.bufsize
+    if getattr(feed, 'use_process', None) is not None:
+        use_process = feed.use_process
+
     transform_config = {
         'WORKER_CONF': {
             'bufsize': bufsize,