How to set your python formatter to black with helix. The following snippet lays out how to set the helix editor to auto-format on save with the black formatter.
[[language]]
name = "python"
language-servers = ["pylsp"]
[language-server.pylsp.config.pylsp]
plugins.pyls_mypy.enabled = true
plugins.pyls_mypy.live_mode = true
plugins.flake8.maxLineLength = 88
plugins.pycodestyle.maxLineLength = 88
[language.formatter]
command = "black"
args = ["--line-length", "88", "--quiet", "-"]