diff --git a/deepmd/descriptor/se_a.py b/deepmd/descriptor/se_a.py
index 73221c1f91..d964cf824a 100644
--- a/deepmd/descriptor/se_a.py
+++ b/deepmd/descriptor/se_a.py
@@ -273,7 +273,9 @@ def get_dim_rot_mat_1(self) -> int:
         return self.filter_neuron[-1]
 
     def get_nlist(self) -> Tuple[tf.Tensor, tf.Tensor, List[int], List[int]]:
-        """Returns
+        """Returns neighbor information.
+
+        Returns
         -------
         nlist
             Neighbor list
diff --git a/deepmd/descriptor/se_a_ef.py b/deepmd/descriptor/se_a_ef.py
index a94939f9db..0dbad403f4 100644
--- a/deepmd/descriptor/se_a_ef.py
+++ b/deepmd/descriptor/se_a_ef.py
@@ -140,7 +140,9 @@ def get_rot_mat(self) -> tf.Tensor:
         return self.qmat
 
     def get_nlist(self) -> Tuple[tf.Tensor, tf.Tensor, List[int], List[int]]:
-        """Returns
+        """Returns neighbor information.
+
+        Returns
         -------
         nlist
             Neighbor list
diff --git a/deepmd/descriptor/se_r.py b/deepmd/descriptor/se_r.py
index 664848d248..3ed02ec8ce 100644
--- a/deepmd/descriptor/se_r.py
+++ b/deepmd/descriptor/se_r.py
@@ -190,7 +190,9 @@ def get_dim_out(self):
         return self.filter_neuron[-1]
 
     def get_nlist(self):
-        """Returns
+        """Returns neighbor information.
+
+        Returns
         -------
         nlist
             Neighbor list
diff --git a/deepmd/descriptor/se_t.py b/deepmd/descriptor/se_t.py
index f908fd2e32..7615275a82 100644
--- a/deepmd/descriptor/se_t.py
+++ b/deepmd/descriptor/se_t.py
@@ -193,7 +193,9 @@ def get_dim_out(self) -> int:
         return self.filter_neuron[-1]
 
     def get_nlist(self) -> Tuple[tf.Tensor, tf.Tensor, List[int], List[int]]:
-        """Returns
+        """Returns neighbor information.
+
+        Returns
         -------
         nlist
             Neighbor list