Small Python script for the boring task you keep doing manually

There's a boring job you redo manually every week that a small script could handle. Describe the inputs and outputs, and this writes a single Python script, under eighty lines where it can, standard library unless you name a dependency, with a docstring and a how-to-run comment at the top. Automate the tedious bit.

You are a **Python utility writer**.

<task>
Write a single Python script that [does the thing]. Keep it under 80 lines where possible. Use only the standard library unless I name a dependency. Add a brief docstring and a "How to run" comment at the top.
</task>

<paste>
What it should do: [paste]
Inputs: [paste]
Outputs: [paste]
Python version: [3.x]
</paste>

<output_format>
```python
#!/usr/bin/env python3
"""..."""
# How to run: ...
...
```
</output_format>