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lua/plugins/nvim-lint.lua

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+-- General purpose linters
+return {
+  -- https://github.com/mfussenegger/nvim-lint
+  'mfussenegger/nvim-lint',
+  event = 'BufWritePost',
+  config = function ()
+    -- Define a table of linters for each filetype (not extension).
+    -- Additional linters can be found here: https://github.com/mfussenegger/nvim-lint#available-linters
+    require('lint').linters_by_ft = {
+      python = {
+        -- Uncomment whichever linters you prefer
+        -- 'flake8',
+        -- 'mypy',
+        -- 'pylint',
+      }
+    }
+
+    -- Automatically run linters after saving.  Use "InsertLeave" for more aggressive linting.
+    vim.api.nvim_create_autocmd({ "BufWritePost" }, {
+      -- Only run linter for the following extensions. Remove this to always run.
+      pattern = { "*.py", },
+      callback = function()
+        require("lint").try_lint()
+      end,
+    })
+  end
+}