Update shufflenet_v2.py

ppcls/modeling/architectures/shufflenet_v2.py

@@ -16,6 +16,7 @@ from __future__ import absolute_import
 from __future__ import division
 from __future__ import print_function
 
+import paddle
 from paddle import ParamAttr, reshape, transpose, concat, split
 from paddle.nn import Layer, Conv2D, MaxPool2D, AdaptiveAvgPool2D, BatchNorm, Linear
 from paddle.nn.initializer import KaimingNormal