I don't pass through stdin so it probably doesn't work, but we can still commit it for now

python/justfile

@@ -0,0 +1,14 @@
+build:
+    python main.py
+
+test:
+    pytest test.py
+
+run:
+    python main.py
+
+jupyter:
+    zsh ~/.config/helix/run_jupyter_from_helix.zsh python
+
+send:
+    python -c 'import sys, textwrap; sys.stdout.write(textwrap.dedent(sys.stdin.read()))' | jupyter run --existing="/tmp/rjh-$(pwd).json"