Update app.py

app.py

@@ -29,13 +29,19 @@ def _run(question, openai_api_key, gemini_api_key, file_name = ""):
         file_name = f"data/{file_name}"
     
     lock = threading.Lock()
-    
+
     with lock:
         answer = ""
 
         try:
             os.environ["OPENAI_API_KEY"] = openai_api_key
             os.environ["GEMINI_API_KEY"] = gemini_api_key
+
+            ###
+            anthropic_api_key = os.getenv("ANTHROPIC_API_KEY")
+            if not anthropic_api_key:
+                raise ValueError("ANTHROPIC_API_KEY environment variable is not set.")
+            ###
             
             answer = run_crew(question, file_name)
         except Exception as e: