Added back networkx import and additional typing imports

app.py

@@ -11,12 +11,13 @@ import asyncio
 import time
 from datetime import datetime
 from enum import Enum
-from typing import Dict, List, Optional
+from typing import Dict, List, Optional, Set, Union, Any
 from dataclasses import dataclass, field
 from pathlib import Path
 import hashlib
 import os
 import json
+import networkx as nx
 from dataclasses import asdict, field
 import shutil
 import tempfile