Add support for single-file environment

[artzok]

Summary

In my project, the Python scripts are all written in single files. Each file may have different environments. I hope that within a single Python script, I can declare the running Python version and related dependencies through comments，for example main.py:

# -*- env_name: figma_export_color -*-
# -*- py_version: 3.8 -*-
# -*- dependencies: [pyyaml==6.0.2, requests] -*-
import sys
import re
import yaml
import json
import os
...

then:

uv run main.py

[mgedmin]

Isn't this already implemented, just with different syntax? https://docs.astral.sh/uv/guides/scripts/#declaring-script-dependencies

[zanieb]

Yep this exists! Check out PEP 723 / our guide.