pre-commit renamed files to PEP standard and removed unused imports

tests/total_annotated_test.py

@@ -0,0 +1,20 @@
+from __future__ import annotations
+
+import os
+from pathlib import Path
+
+from database import connect
+from database import total_annotated
+from dotenv import load_dotenv
+
+if __name__ == '__main__':
+    # prepare env vars
+    env_path = Path(__file__).parent.parent / 'local.env'
+    assert env_path.exists()
+    load_dotenv(env_path)
+    os.environ['MONGO_HOST'] = 'localhost'
+    # connect to database
+    collection, db, client = connect()
+    # get visual communication
+    num_docs = total_annotated(collection)
+    print(f"number of annotated  documents in database: {num_docs}")