fix: avoid mutable analyst defaults

tests/test_factor_rules.py

@@ -1,3 +1,4 @@
+import ast
 import importlib.util
 import json
 import tempfile
@@ -5,6 +6,7 @@ import unittest
 from pathlib import Path
 
 MODULE_PATH = Path(__file__).resolve().parents[1] / "tradingagents" / "agents" / "utils" / "factor_rules.py"
+GRAPH_SETUP_PATH = Path(__file__).resolve().parents[1] / "tradingagents" / "graph" / "setup.py"
 SPEC = importlib.util.spec_from_file_location("factor_rules", MODULE_PATH)
 factor_rules = importlib.util.module_from_spec(SPEC)
 SPEC.loader.exec_module(factor_rules)
@@ -375,5 +377,25 @@ class FactorRulesPathTests(unittest.TestCase):
         self.assertIn("- Conditions: ", summary)
 
 
+class GraphSetupSourceTests(unittest.TestCase):
+    def test_setup_graph_avoids_mutable_default_selected_analysts(self):
+        source = GRAPH_SETUP_PATH.read_text(encoding="utf-8")
+        module = ast.parse(source)
+
+        setup_graph = None
+        for node in module.body:
+            if isinstance(node, ast.ClassDef) and node.name == "GraphSetup":
+                for item in node.body:
+                    if isinstance(item, ast.FunctionDef) and item.name == "setup_graph":
+                        setup_graph = item
+                        break
+
+        self.assertIsNotNone(setup_graph)
+        self.assertEqual(len(setup_graph.args.defaults), 1)
+        self.assertIsInstance(setup_graph.args.defaults[0], ast.Constant)
+        self.assertIsNone(setup_graph.args.defaults[0].value)
+        self.assertIn('selected_analysts = ["market", "social", "news", "fundamentals", "factor_rules"]', source)
+
+
 if __name__ == "__main__":
     unittest.main()

tradingagents/graph/setup.py

@@ -1,6 +1,6 @@
 # TradingAgents/graph/setup.py
 
-from typing import Dict, Any
+from typing import Dict, Any, Optional, List
 from langchain_openai import ChatOpenAI
 from langgraph.graph import END, StateGraph, START
 from langgraph.prebuilt import ToolNode
@@ -38,7 +38,7 @@ class GraphSetup:
         self.conditional_logic = conditional_logic
 
     def setup_graph(
-        self, selected_analysts=["market", "social", "news", "fundamentals", "factor_rules"]
+        self, selected_analysts: Optional[List[str]] = None
     ):
         """Set up and compile the agent workflow graph.
 
@@ -50,6 +50,9 @@ class GraphSetup:
                 - "fundamentals": Fundamentals analyst
                 - "factor_rules": Factor rule analyst
         """
+        if selected_analysts is None:
+            selected_analysts = ["market", "social", "news", "fundamentals", "factor_rules"]
+
         if len(selected_analysts) == 0:
             raise ValueError("Trading Agents Graph Setup Error: no analysts selected!")