diff --git a/examples/data_demo/data_cache_demo.py b/examples/data_demo/data_cache_demo.py
index 55adb8be6..dd65e3168 100644
--- a/examples/data_demo/data_cache_demo.py
+++ b/examples/data_demo/data_cache_demo.py
@@ -1,8 +1,8 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 """
-    The motivation of this demo
-    - To show the data modules of Qlib is Serializable, users can dump processed data to disk to avoid duplicated data preprocessing
+The motivation of this demo
+- To show the data modules of Qlib is Serializable, users can dump processed data to disk to avoid duplicated data preprocessing
 """
 
 from copy import deepcopy
diff --git a/examples/data_demo/data_mem_resuse_demo.py b/examples/data_demo/data_mem_resuse_demo.py
index cec513306..9853fe4ae 100644
--- a/examples/data_demo/data_mem_resuse_demo.py
+++ b/examples/data_demo/data_mem_resuse_demo.py
@@ -1,8 +1,8 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 """
-    The motivation of this demo
-    - To show the data modules of Qlib is Serializable, users can dump processed data to disk to avoid duplicated data preprocessing
+The motivation of this demo
+- To show the data modules of Qlib is Serializable, users can dump processed data to disk to avoid duplicated data preprocessing
 """
 
 from copy import deepcopy
diff --git a/examples/orderbook_data/create_dataset.py b/examples/orderbook_data/create_dataset.py
index f2b7a8a68..b94e76c43 100755
--- a/examples/orderbook_data/create_dataset.py
+++ b/examples/orderbook_data/create_dataset.py
@@ -1,10 +1,10 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 """
-    NOTE:
-    - This scripts is a demo to import example data import Qlib
-    - !!!!!!!!!!!!!!!TODO!!!!!!!!!!!!!!!!!!!:
-        - Its structure is not well designed and very ugly, your contribution is welcome to make importing dataset easier
+NOTE:
+- This scripts is a demo to import example data import Qlib
+- !!!!!!!!!!!!!!!TODO!!!!!!!!!!!!!!!!!!!:
+    - Its structure is not well designed and very ugly, your contribution is welcome to make importing dataset easier
 """
 from datetime import date, datetime as dt
 import os
diff --git a/examples/workflow_by_code.py b/examples/workflow_by_code.py
index 94de5c082..0f2623b5f 100644
--- a/examples/workflow_by_code.py
+++ b/examples/workflow_by_code.py
@@ -1,7 +1,7 @@
 #  Copyright (c) Microsoft Corporation.
 #  Licensed under the MIT License.
 """
-Qlib provides two kinds of interfaces. 
+Qlib provides two kinds of interfaces.
 (1) Users could define the Quant research workflow by a simple configuration.
 (2) Qlib is designed in a modularized way and supports creating research workflow by code just like building blocks.
 
diff --git a/qlib/contrib/torch.py b/qlib/contrib/torch.py
index 293785c55..fdd18e230 100644
--- a/qlib/contrib/torch.py
+++ b/qlib/contrib/torch.py
@@ -1,9 +1,9 @@
 # Copyright (c) Microsoft Corporation.
 # Licensed under the MIT License.
 """
-    This module is not a necessary part of Qlib.
-    They are just some tools for convenience
-    It is should not imported into the core part of qlib
+This module is not a necessary part of Qlib.
+They are just some tools for convenience
+It is should not imported into the core part of qlib
 """
 import torch
 import numpy as np