Update DescrptSeA.py

Author: GeiduanLiu

source/train/DescrptSeA.py

@@ -1,6 +1,6 @@
 import numpy as np
 from deepmd.env import tf
-from deepmd.common import ClassArg, get_activation_func， get_precision_func
+from deepmd.common import ClassArg, get_activation_func, get_precision_func
 from deepmd.RunOptions import global_tf_float_precision
 from deepmd.RunOptions import global_np_float_precision
 from deepmd.env import op_module