diff --git a/document/02-local-env.en.md b/document/02-local-env.en.md
index 08279d889..68c4e9116 100644
--- a/document/02-local-env.en.md
+++ b/document/02-local-env.en.md
@@ -30,6 +30,8 @@ You can install the dependencies by running the following command.
 
 ```shell
 $ cd python
+$ python -m venv .venv
+$ source .venv/bin/activate
 $ pip install -r requirements.txt
 ```
 
diff --git a/document/02-local-env.ja.md b/document/02-local-env.ja.md
index e2949c402..6f33db209 100644
--- a/document/02-local-env.ja.md
+++ b/document/02-local-env.ja.md
@@ -30,6 +30,8 @@ Pythonでは、`requirements.txt`というファイルに依存しているラ
 
 ```shell
 $ cd python
+$ python -m venv .venv
+$ source .venv/bin/activate
 $ pip install -r requirements.txt
 ```
 
diff --git a/python/.gitignore b/python/.gitignore
new file mode 100644
index 000000000..a230a78ae
--- /dev/null
+++ b/python/.gitignore
@@ -0,0 +1,2 @@
+.venv/
+__pycache__/