diff --git a/ppdet/modeling/heads/sparsercnn_head.py b/ppdet/modeling/heads/sparsercnn_head.py
index 9e26f092dfad41940beec4b88eab953dc7967a30..30270b6ecc9f827284fed11b4349b1e3787dfb81 100644
--- a/ppdet/modeling/heads/sparsercnn_head.py
+++ b/ppdet/modeling/heads/sparsercnn_head.py
@@ -21,10 +21,10 @@ import copy
 import paddle
 import paddle.nn as nn
 
-import ppdet.modeling.initializer as init
 from ppdet.core.workspace import register
 from ppdet.modeling.heads.roi_extractor import RoIAlign
 from ppdet.modeling.bbox_utils import delta2bbox
+from .. import initializer as init
 
 _DEFAULT_SCALE_CLAMP = math.log(100000. / 16)
 
@@ -366,6 +366,5 @@ class SparseRCNNHead(nn.Layer):
 
 def box_cxcywh_to_xyxy(x):
     x_c, y_c, w, h = x.unbind(-1)
-    b = [(x_c - 0.5 * w), (y_c - 0.5 * h),
-         (x_c + 0.5 * w), (y_c + 0.5 * h)]
-    return paddle.stack(b, axis=-1)
\ No newline at end of file
+    b = [(x_c - 0.5 * w), (y_c - 0.5 * h), (x_c + 0.5 * w), (y_c + 0.5 * h)]
+    return paddle.stack(b, axis=-1)