diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index 330cf730..71eaaa3f 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -76,3 +76,4 @@ repos:
         types: [python]
         pass_filenames: false
         always_run: false
+        args: ["python"]
diff --git a/docs/docs/examples/examples/01_docs_to_knowledge_graph.md b/docs/docs/examples/examples/01_docs_to_knowledge_graph.md
index 0c644f41..ad3a9918 100644
--- a/docs/docs/examples/examples/01_docs_to_knowledge_graph.md
+++ b/docs/docs/examples/examples/01_docs_to_knowledge_graph.md
@@ -373,4 +373,4 @@ You can open it at [http://localhost:7474](http://localhost:7474), and run the f
 MATCH p=()-->() RETURN p
 ```
 
-![Neo4j Browser](/img/examples/docs_to_knowledge_graph/neo4j_browser.png)
\ No newline at end of file
+![Neo4j Browser](/img/examples/docs_to_knowledge_graph/neo4j_browser.png)
diff --git a/docs/docs/sources/index.md b/docs/docs/sources/index.md
index 09cbe166..0857b146 100644
--- a/docs/docs/sources/index.md
+++ b/docs/docs/sources/index.md
@@ -17,6 +17,6 @@ In CocoIndex, a source is the data origin you import from (e.g., files, database
 | [Postgres](/docs/sources/postgres)       | Relational database (Postgres)           |
 
 Related:
-- [Life cycle of a indexing flow](/docs/core/basics#life-cycle-of-an-indexing-flow) 
-- [Live Update Tutorial](/docs/tutorials/live_updates) 
+- [Life cycle of a indexing flow](/docs/core/basics#life-cycle-of-an-indexing-flow)
+- [Live Update Tutorial](/docs/tutorials/live_updates)
 for change capture mechanisms.
diff --git a/docs/docs/targets/index.md b/docs/docs/targets/index.md
index c90d7654..f90a5c32 100644
--- a/docs/docs/targets/index.md
+++ b/docs/docs/targets/index.md
@@ -334,6 +334,3 @@ You can find end-to-end examples fitting into any of supported property graphs i
 *   <ExampleButton href="https://github.com/cocoindex-io/cocoindex/tree/main/examples/docs_to_knowledge_graph" text="Docs to Knowledge Graph" margin="0 0 16px 0" />
 
 *   <ExampleButton href="https://github.com/cocoindex-io/cocoindex/tree/main/examples/product_recommendation" text="Product Recommendation" margin="0 0 16px 0" />
-
-
-
diff --git a/docs/docs/targets/kuzu.md b/docs/docs/targets/kuzu.md
index 441e9e78..dc741063 100644
--- a/docs/docs/targets/kuzu.md
+++ b/docs/docs/targets/kuzu.md
@@ -13,7 +13,7 @@ Exports data to a [Kuzu](https://kuzu.com/) graph database.
 
 ## Get Started
 
-Read [Property Graph Targets](./index.md#property-graph-targets) for more information to get started on how it works in CocoIndex. 
+Read [Property Graph Targets](./index.md#property-graph-targets) for more information to get started on how it works in CocoIndex.
 
 ## Spec
 
@@ -59,4 +59,4 @@ You can then access the explorer at [http://localhost:8124](http://localhost:812
   href="https://github.com/cocoindex-io/cocoindex/tree/main/examples/docs_to_knowledge_graph"
   text="Docs to Knowledge Graph"
   margin="16px 0 24px 0"
-/>
\ No newline at end of file
+/>
diff --git a/docs/docs/targets/neo4j.md b/docs/docs/targets/neo4j.md
index ab9e0d16..5e4fdb22 100644
--- a/docs/docs/targets/neo4j.md
+++ b/docs/docs/targets/neo4j.md
@@ -11,7 +11,7 @@ import { ExampleButton } from '../../src/components/GitHubButton';
 
 
 ## Get Started
-Read [Property Graph Targets](./index.md#property-graph-targets) for more information to get started on how it works in CocoIndex. 
+Read [Property Graph Targets](./index.md#property-graph-targets) for more information to get started on how it works in CocoIndex.
 
 
 ## Spec
@@ -59,4 +59,4 @@ If you are building multiple CocoIndex flows from different projects to neo4j, w
 
 This way, you can clean up the data for each flow independently.
 
-In case you need to clean up the data in the same database, you can do it manually by running `cocoindex drop <APP_TARGET>` from the project you want to clean up.
\ No newline at end of file
+In case you need to clean up the data in the same database, you can do it manually by running `cocoindex drop <APP_TARGET>` from the project you want to clean up.
diff --git a/examples/product_recommendation/README.md b/examples/product_recommendation/README.md
index f3ce29b0..314464cf 100644
--- a/examples/product_recommendation/README.md
+++ b/examples/product_recommendation/README.md
@@ -8,7 +8,7 @@ Please drop [CocoIndex on Github](https://github.com/cocoindex-io/cocoindex) a s
 
 
 ## Prerequisite
-*   [Install Postgres](https://cocoindex.io/docs/getting_started/installation#-install-postgres) 
+*   [Install Postgres](https://cocoindex.io/docs/getting_started/installation#-install-postgres)
 *   Install [Neo4j](https://cocoindex.io/docs/targets/neo4j)
 *   [Configure your OpenAI API key](https://cocoindex.io/docs/ai/llm#openai).