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Create a data directory in your application root
Store all pickle files in this directory instead of the root
Ensure the directory exists before trying to write files
Use proper path joining for cross-platform compatibility

.gitignore

@@ -77,3 +77,9 @@ coverage.xml
 local_settings.py
 db.sqlite3
 db.sqlite3-journal
+
+# Data directory
+data/
+
+# OS
+Thumbs.db

app.py

@@ -9,13 +9,18 @@ from io import BytesIO
 # Load environment variables
 load_dotenv()
 
+# Create data directory if it doesn't exist
+DATA_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)), 'data')
+os.makedirs(DATA_DIR, exist_ok=True)
+
 def load_pickle_from_url(url, local_filename):
-    if os.path.exists(local_filename):
-        with open(local_filename, 'rb') as f:
+    local_path = os.path.join(DATA_DIR, local_filename)
+    if os.path.exists(local_path):
+        with open(local_path, 'rb') as f:
             return pickle.load(f)
     response = requests.get(url)
     response.raise_for_status()
-    with open(local_filename, 'wb') as f:
+    with open(local_path, 'wb') as f:
         f.write(response.content)
     return pickle.load(BytesIO(response.content))