fix single precision error (#1212)

Author: denghuilu

deepmd/descriptor/se_a.py

@@ -3,7 +3,7 @@
 from typing import Tuple, List, Dict, Any
 
 from deepmd.env import tf
-from deepmd.common import get_activation_func, get_precision, ACTIVATION_FN_DICT, PRECISION_DICT, docstring_parameter, get_np_precision
+from deepmd.common import get_activation_func, get_precision, ACTIVATION_FN_DICT, PRECISION_DICT, docstring_parameter
 from deepmd.utils.argcheck import list_to_doc
 from deepmd.env import GLOBAL_TF_FLOAT_PRECISION
 from deepmd.env import GLOBAL_NP_FLOAT_PRECISION
@@ -13,7 +13,7 @@
 from deepmd.utils.tabulate import DPTabulate
 from deepmd.utils.type_embed import embed_atom_type
 from deepmd.utils.sess import run_sess
-from deepmd.utils.graph import load_graph_def, get_tensor_by_name_from_graph, get_embedding_net_variables
+from deepmd.utils.graph import load_graph_def, get_tensor_by_name_from_graph
 from .descriptor import Descriptor
 from .se import DescrptSe
 
@@ -133,7 +133,6 @@ def __init__ (self,
         self.compress_activation_fn = get_activation_func(activation_function)
         self.filter_activation_fn = get_activation_func(activation_function)
         self.filter_precision = get_precision(precision)
-        self.filter_np_precision = get_np_precision(precision)
         self.exclude_types = set()
         for tt in exclude_types:
             assert(len(tt) == 2)
@@ -687,7 +686,7 @@ def _filter_lower(
             net = 'filter_-1_net_' + str(type_i)
           else:
             net = 'filter_' + str(type_input) + '_net_' + str(type_i)
-          return op_module.tabulate_fusion(self.table.data[net].astype(self.filter_np_precision), info, xyz_scatter, tf.reshape(inputs_i, [natom, shape_i[1]//4, 4]), last_layer_size = outputs_size[-1])  
+          return op_module.tabulate_fusion(tf.cast(self.table.data[net], self.filter_precision), info, xyz_scatter, tf.reshape(inputs_i, [natom, shape_i[1]//4, 4]), last_layer_size = outputs_size[-1])  
         else:
           if (not is_exclude):
               xyz_scatter = embedding_net(