Create cache.py

cache.py

@@ -0,0 +1,10 @@
+import redis, hashlib, json, os
+r = redis.Redis.from_url(os.getenv("REDIS_URL", "redis://localhost:6379/0"))
+
+def cached(key: str, fn):
+    h = hashlib.sha256(key.encode()).hexdigest()
+    if (val := r.get(h)):
+        return json.loads(val)
+    out = fn()
+    r.setex(h, 3600, json.dumps(out))
+    return out