diff --git a/checkpoint b/checkpoint
index d6c7373516..aa6f74047b 100644
--- a/checkpoint
+++ b/checkpoint
@@ -1 +1 @@
-model.ckpt-1.pt
\ No newline at end of file
+model.ckpt-1.pt
diff --git a/examples/property/train/input_torch.json b/examples/property/train/input_torch.json
index ed1afc3a7c..915edb46a1 100644
--- a/examples/property/train/input_torch.json
+++ b/examples/property/train/input_torch.json
@@ -179,7 +179,9 @@
   "loss": {
     "type": "property",
     "loss_func": "smooth_mae",
-    "metric": ["mae"],
+    "metric": [
+      "mae"
+    ],
     "beta": 1.00,
     "_comment": " that's all"
   },
diff --git a/source/tests/tf/input.json b/source/tests/tf/input.json
index d976ef43ff..f39227f7ce 100644
--- a/source/tests/tf/input.json
+++ b/source/tests/tf/input.json
@@ -1,83 +1,83 @@
 {
-    "_comment1": " model parameters",
-    "model": {
-        "type_map": [
-            "O",
-            "H"
-        ],
-        "descriptor": {
-            "type": "se_e2_a",
-            "sel": [
-                46,
-                92
-            ],
-            "rcut_smth": 0.5,
-            "rcut": 6.0,
-            "_comment": "N2=2N1, N2=N1, and otherwise can be tested",
-            "neuron": [
-                4,
-                8,
-                17,
-                17
-            ],
-            "resnet_dt": false,
-            "axis_neuron": 16,
-            "seed": 1,
-            "_comment2": " that's all",
-            "exclude_types": [
-                [
-                    0,
-                    1
-                ]
-            ]
-        },
-        "fitting_net": {
-            "neuron": [
-                20,
-                20,
-                20
-            ],
-            "resnet_dt": true,
-            "seed": 1,
-            "_comment3": " that's all"
-        },
-        "_comment4": " that's all"
+  "_comment1": " model parameters",
+  "model": {
+    "type_map": [
+      "O",
+      "H"
+    ],
+    "descriptor": {
+      "type": "se_e2_a",
+      "sel": [
+        46,
+        92
+      ],
+      "rcut_smth": 0.5,
+      "rcut": 6.0,
+      "_comment": "N2=2N1, N2=N1, and otherwise can be tested",
+      "neuron": [
+        4,
+        8,
+        17,
+        17
+      ],
+      "resnet_dt": false,
+      "axis_neuron": 16,
+      "seed": 1,
+      "_comment2": " that's all",
+      "exclude_types": [
+        [
+          0,
+          1
+        ]
+      ]
     },
-    "learning_rate": {
-        "type": "exp",
-        "decay_steps": 5000,
-        "start_lr": 0.001,
-        "stop_lr": 3.51e-08,
-        "_comment5": "that's all"
+    "fitting_net": {
+      "neuron": [
+        20,
+        20,
+        20
+      ],
+      "resnet_dt": true,
+      "seed": 1,
+      "_comment3": " that's all"
     },
-    "loss": {
-        "type": "ener",
-        "start_pref_e": 0.02,
-        "limit_pref_e": 1,
-        "start_pref_f": 1000,
-        "limit_pref_f": 1,
-        "start_pref_v": 0,
-        "limit_pref_v": 0,
-        "_comment6": " that's all"
+    "_comment4": " that's all"
+  },
+  "learning_rate": {
+    "type": "exp",
+    "decay_steps": 5000,
+    "start_lr": 0.001,
+    "stop_lr": 3.51e-08,
+    "_comment5": "that's all"
+  },
+  "loss": {
+    "type": "ener",
+    "start_pref_e": 0.02,
+    "limit_pref_e": 1,
+    "start_pref_f": 1000,
+    "limit_pref_f": 1,
+    "start_pref_v": 0,
+    "limit_pref_v": 0,
+    "_comment6": " that's all"
+  },
+  "training": {
+    "training_data": {
+      "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
+      "batch_size": "auto",
+      "_comment7": "that's all"
     },
-    "training": {
-        "training_data": {
-            "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
-            "batch_size": "auto",
-            "_comment7": "that's all"
-        },
-        "validation_data": {
-            "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
-            "batch_size": 1,
-            "numb_btch": 3,
-            "_comment8": "that's all"
-        },
-        "numb_steps": 1,
-        "seed": 10,
-        "disp_file": "lcurve.out",
-        "disp_freq": 1,
-        "save_freq": 1,
-        "_comment9": "that's all"
+    "validation_data": {
+      "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
+      "batch_size": 1,
+      "numb_btch": 3,
+      "_comment8": "that's all"
     },
-    "_comment10": "that's all"
-}
\ No newline at end of file
+    "numb_steps": 1,
+    "seed": 10,
+    "disp_file": "lcurve.out",
+    "disp_freq": 1,
+    "save_freq": 1,
+    "_comment9": "that's all"
+  },
+  "_comment10": "that's all"
+}
diff --git a/source/tests/tf/input_se_a_ebd_v2.json b/source/tests/tf/input_se_a_ebd_v2.json
index 0ff86b8cc0..530d996383 100644
--- a/source/tests/tf/input_se_a_ebd_v2.json
+++ b/source/tests/tf/input_se_a_ebd_v2.json
@@ -1,66 +1,66 @@
 {
-    "_comment1": " model parameters",
-    "model": {
-        "type_map": [
-            "O",
-            "H"
-        ],
-        "descriptor": {
-            "type": "se_a_ebd_v2",
-            "type_one_side": false
-        },
-        "fitting_net": {
-            "neuron": [
-                20,
-                20,
-                20
-            ],
-            "resnet_dt": true,
-            "seed": 1,
-            "_comment3": " that's all"
-        },
-        "_comment4": " that's all",
-        "type_embedding": {
-            "neuron": [
-                1
-            ]
-        }
+  "_comment1": " model parameters",
+  "model": {
+    "type_map": [
+      "O",
+      "H"
+    ],
+    "descriptor": {
+      "type": "se_a_ebd_v2",
+      "type_one_side": false
     },
-    "learning_rate": {
-        "type": "exp",
-        "decay_steps": 5000,
-        "start_lr": 0.001,
-        "stop_lr": 3.51e-08,
-        "_comment5": "that's all"
+    "fitting_net": {
+      "neuron": [
+        20,
+        20,
+        20
+      ],
+      "resnet_dt": true,
+      "seed": 1,
+      "_comment3": " that's all"
     },
-    "loss": {
-        "type": "ener",
-        "start_pref_e": 0.02,
-        "limit_pref_e": 1,
-        "start_pref_f": 1000,
-        "limit_pref_f": 1,
-        "start_pref_v": 0,
-        "limit_pref_v": 0,
-        "_comment6": " that's all"
+    "_comment4": " that's all",
+    "type_embedding": {
+      "neuron": [
+        1
+      ]
+    }
+  },
+  "learning_rate": {
+    "type": "exp",
+    "decay_steps": 5000,
+    "start_lr": 0.001,
+    "stop_lr": 3.51e-08,
+    "_comment5": "that's all"
+  },
+  "loss": {
+    "type": "ener",
+    "start_pref_e": 0.02,
+    "limit_pref_e": 1,
+    "start_pref_f": 1000,
+    "limit_pref_f": 1,
+    "start_pref_v": 0,
+    "limit_pref_v": 0,
+    "_comment6": " that's all"
+  },
+  "training": {
+    "training_data": {
+      "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
+      "batch_size": "auto",
+      "_comment7": "that's all"
     },
-    "training": {
-        "training_data": {
-            "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
-            "batch_size": "auto",
-            "_comment7": "that's all"
-        },
-        "validation_data": {
-            "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
-            "batch_size": 1,
-            "numb_btch": 3,
-            "_comment8": "that's all"
-        },
-        "numb_steps": 1,
-        "seed": 10,
-        "disp_file": "lcurve.out",
-        "disp_freq": 1,
-        "save_freq": 1,
-        "_comment9": "that's all"
+    "validation_data": {
+      "systems": "/home/data/zcq/deepmd-kit/source/tests/tf/model_compression/data",
+      "batch_size": 1,
+      "numb_btch": 3,
+      "_comment8": "that's all"
     },
-    "_comment10": "that's all"
-}
\ No newline at end of file
+    "numb_steps": 1,
+    "seed": 10,
+    "disp_file": "lcurve.out",
+    "disp_freq": 1,
+    "save_freq": 1,
+    "_comment9": "that's all"
+  },
+  "_comment10": "that's all"
+}