I had to give a specific version of black this morning. I didn't yesterday. Don't specify the version unless it makes you.

$ cd ~/Envs
$ mkdir black
$ cd black
$ pipenv --python 3.6
$ pipenv install black==18.5b0
$ pipenv run which black
/Users/kirk/.local/share/virtualenvs/black-wkc_P2WA/bin/black

Take note of that last line!

https://marketplace.visualstudio.com/items?itemName=joslarson.black-vscode

Open your user settings and add:

    "[python]": {
        "editor.rulers": [
            99
        ],
        "black.path": "/Users/kirk/.local/share/virtualenvs/black-wkc_P2WA/bin/black",
        "python.formatting.provider": "none",
    },

Now you can use the command palette to run "Format Document" to run Black on the current file. Down the road, we can set "editor.formatOnSave": true to automatically run it every time you save a file.