python3

src/Applications/bash.md

@@ -16,6 +16,12 @@ export HISTCONTROL=ignoreboth:erasedups
 export HISTIGNORE="cd:cd *:ls:ls *:pwd:exit"
 ```
 
+Shebang:
+
+```sh
+#!/usr/bin/env bash
+```
+
 ## Bash completion
 
 | Distribution | Package           |

src/Development/python/README.md

@@ -0,0 +1,13 @@
+# Python
+
+| Distribution | Package   |
+| ------------ | --------- |
+| Arch Linux   | `python`  |
+| Ubuntu       | `python3` |
+| Homebrew     | `python3` |
+
+Shebang:
+
+```sh
+#!/usr/bin/env python3
+```

src/Development/python/venv.md

@@ -1,6 +1,4 @@
-# Python
-
-## venv
+# venv
 
 Python venv is Python Virtual Environment.
 Why do we need to use Python venv?

src/SUMMARY.md

@@ -36,7 +36,8 @@
   - [Go](Development/go/README.md)
     - [time](Development/go/time.md)
     - [testing](Development/go/testing.md)
-  - [Python](Development/python.md)
+  - [Python](Development/python/README.md)
+    - [venv](Development/python/venv.md)
   - [Docker](Development/docker.md)
   - [Redis](Development/redis.md)
   - [Prometheus](Development/prometheus.md)