home: vim: configure 'null-ls' for 'python'

home/vim/after/ftplugin/python.vim

@@ -1,6 +1,18 @@
 " Create the `b:undo_ftplugin` variable if it doesn't exist
 call ftplugined#check_undo_ft()
 
+" Set-up LSP, linters, formatters
+lua << EOF
+local null_ls = require("null-ls")
+null_ls.register({
+    null_ls.builtins.diagnostics.flake8,
+    null_ls.builtins.diagnostics.mypy,
+    null_ls.builtins.diagnostics.pylint,
+    null_ls.builtins.formatting.black,
+    null_ls.builtins.formatting.isort,
+})
+EOF
+
 " Change max length of a line to 88 for this buffer to match black's settings
 setlocal colorcolumn=88
 let b:undo_ftplugin.='|setlocal colorcolumn<'