Automatically format Python files

.config/emacs/init.el

@@ -168,6 +168,18 @@
               ("C-c C-l" . nil))
   :hook ((python-mode . load-python-env)))
 
+; Requires the Python package "black"
+(use-package blacken
+  :hook (python-mode . blacken-mode))
+
+; Requires the Python package "isort"
+(use-package py-isort
+  :hook (before-save . (lambda ()
+                         (when (bound-and-true-p blacken-mode)
+                           (py-isort-before-save))))
+  :config
+  (setq py-isort-options '("--profile" "black")))
+
 ;; Jupyter notebook integration
 (use-package ein
   :bind (("C-z j" . ein:run)

.local/bin/make-venv

@@ -2,5 +2,9 @@
 
 python3 -m venv .venv
 . .venv/bin/activate
-pip install 'python-lsp-server[rope]' python-lsp-ruff
+pip install \
+    black \
+    isort \
+    'python-lsp-server[rope]' \
+    python-lsp-ruff
 pip install -e .