I was writing this as a response to your tweet, but decided I might just make it a pull request.

I feel like it might be confusing to those unfamiliar with Python's -m flag and the built-in venv module to omit the space between the flag and its argument. By adding a space and prefixing the second occurrence of venv with a ./ it's maybe a bit clearer what the arguments are and what they do.

By also using python3 -m pip it becomes even clearer that -m is a special flag that makes the python executable do neat things.