try...except with os.environ

app.py

@@ -50,7 +50,10 @@ class RetrievalAugmentedQAPipeline:
         return {"response": generate_response(), "context": context_list}
 
 # text_splitter = RecursiveCharacterTextSplitter()
-api_key = os.getenv("OPENAI_API_KEY")
+try:
+    api_key = os.environ["OPENAI_API_KEY"]
+except KeyError:
+    print("Environment variable OPENAI_API_KEY not found")
 text_splitter = SemanticChunker(OpenAIEmbeddings(api_key=api_key), breakpoint_threshold_type="standard_deviation")
 
 def process_text_file(file: AskFileResponse):