fix: Add traci/sumolib to requirements and safe fallback imports

requirements.txt

@@ -28,7 +28,9 @@ shap>=0.45.0
 matplotlib>=3.8.0
 seaborn>=0.13.0
 
-# Utilities
+# Utilities & Simulation
 pyyaml>=6.0.1
 requests>=2.31.0
 tqdm>=4.66.0
+traci>=1.18.0
+sumolib>=1.18.0

src/integration/sumo_conflict_adapter.py

@@ -1,4 +1,7 @@
-import traci
+try:
+    import traci
+except ImportError:
+    traci = None
 
 from integration.conflict_graph import ConflictGraph
 from integration.sumo_topology_adapter import SUMOTopologyAdapter

src/integration/sumo_decision_controller.py

@@ -21,8 +21,10 @@ if SRC_ROOT not in sys.path:
     sys.path.insert(0, SRC_ROOT)
 if PROJECT_ROOT not in sys.path:
     sys.path.insert(0, PROJECT_ROOT)
-
-import traci
+try:
+    import traci
+except ImportError:
+    traci = None
 
 from integration.controller import TrafficController
 from integration.decision_engine import DecisionEngine

src/integration/sumo_demand.py

@@ -1,4 +1,7 @@
-import traci
+try:
+    import traci
+except ImportError:
+    traci = None
 
 
 class SUMODemandCalculator:

src/integration/sumo_phase_adapter.py

@@ -1,4 +1,7 @@
-import traci
+try:
+    import traci
+except ImportError:
+    traci = None
 
 
 class SUMOPhaseAdapter:

src/integration/sumo_prediction_controller.py

@@ -1,7 +1,10 @@
 import os
 import sys
 
-import traci
+try:
+    import traci
+except ImportError:
+    traci = None
 import numpy as np
 
 from integration.prediction_adapter import TrafficPredictionAdapter

src/integration/sumo_topology_adapter.py

@@ -1,4 +1,7 @@
-import traci
+try:
+    import traci
+except ImportError:
+    traci = None
 
 from integration.topology import JunctionTopology