Update models.py

examples/emotion_detection/models.py

@@ -13,7 +13,7 @@
 # limitations under the License.
 import paddle.fluid as fluid
 from paddle.fluid.dygraph.nn import Linear, Embedding
-from paddle.fluid.dygraph.base import to_variable
+# from paddle.fluid.dygraph.base import to_variable
 import numpy as np
 from hapi.model import Model
 from hapi.text.text import GRUEncoderLayer as BiGRUEncoder