Update app.py

app.py

@@ -24,10 +24,12 @@ anthropic = Anthropic(
     api_key=os.environ.get('ANTHROPIC_API_KEY')
 )
 
-openai.api_key = os.getenv("My_MathTest_key")
-
+# Initialize OpenAI client
+openai.api_key = os.environ.get('My_MathTest_Key')  
 if openai.api_key is None:
-    raise ValueError("OpenAI API key not found.")
+    logger.error("OpenAI API key not found in environment variables")
+    raise ValueError("OpenAI API key not found. Please set the My_MathTest_Key environment variable.")
+    
 
 # Request tracking
 MAX_REQUESTS_PER_DAY = 500