Initial commit.

cache.py

@@ -0,0 +1,23 @@
+import json
+import os
+
+CACHE_DIR = os.path.join(os.path.dirname(__file__), 'cache')
+
+
+def _cache_path(key: str) -> str:
+    safe_key = key.replace('/', '_').replace(' ', '_')
+    return os.path.join(CACHE_DIR, f"{safe_key}.json")
+
+
+def get_cached(key: str):
+    path = _cache_path(key)
+    if not os.path.exists(path):
+        return None
+    with open(path) as f:
+        return json.load(f)
+
+
+def set_cached(key: str, data) -> None:
+    os.makedirs(CACHE_DIR, exist_ok=True)
+    with open(_cache_path(key), 'w') as f:
+        json.dump(data, f, indent=2)