[py] Set up similar to rust

py/.gitignore

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+__pycache__
+/.venv
+*.egg-info

py/aoc/__init__.py

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+import sys
+import argparse
+from pathlib import Path
+
+DAYS = {}
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument("files", type=Path, nargs="+")
+    args = parser.parse_args()
+
+    first_day = True
+    for file in args.files:
+        if not first_day:
+            print()
+        first_day = False
+
+        day = DAYS.get(file.stem)
+        if day is None:
+            print(f"### Could not determine day: {file}", file=sys.stderr)
+            continue
+
+        print(f"### Solving day {file.stem}")
+        with open(file) as f:
+            inputstr = f.read()
+        day(inputstr)

py/pyproject.toml

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+[build-system]
+requires = ["setuptools"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "aoc-py"
+version = "0.0.0"
+
+[project.scripts]
+aoc-py = "aoc:main"