Update tools.py

tools.py

@@ -182,5 +182,7 @@ if __name__ == "__main__":
     # Test Python REPL Tool
     print("\n--- Python REPL Tool Test ---")
     print(f"Python REPL '2 + 2': {python_repl_tool.invoke({'code': '2 + 2'})}")
-    print(f"Python REPL 'len(\'hello\')': {python_repl_tool.invoke({'code': 'len(\'hello\')'})}")
+    #print(f"Python REPL 'len(\'hello\')': {python_repl_tool.invoke({'code': 'len(\'hello\')'})}")
+    test_code_len = 'len("hello")'
+    print(f"Python REPL '{test_code_len}': {python_repl_tool.invoke({'code': test_code_len})}")
     print(f"Python REPL error: {python_repl_tool.invoke({'code': '10 / 0'})}")