Turns out you can just do things. The astral tooling is by far the best thing that has happened to Python in years and it makes me very happy.
replies(2):
E.g.
uv init --script foo.py
uv add --script foo.py httpx
cat foo.py
...
dependencies = ['httpx']
...
uv run foo.py
# creates a virtual env, reads foo.py to see httpx is a dependency, installs in the ephemeral venv then runs the script
Before (analogous to go mod init):
python -m venv venv
source venv/bin/activate
python -m pip install -U pip
pip install httpx
pip freeze > requirements.txt
nvim foo.py
# find a way to share foo.py and requirements.txt
python -m venv venv
source venv/bin/activate
python -m pip install -U pip
pip install -r requirements.txt
python foo.py
uv run foo.py
./my-go-binary