environment variable method changed

app.py

@@ -13,9 +13,9 @@ embeddings = OpenAIEmbeddings()
 # PINECONE_API_KEY = '6af52b8a-a3df-4189-899b-b21163027bb8'
 # PINECONE_API_ENV = 'asia-southeast1-gcp'
 
-PINECONE_API_KEY = os.environ["PINECONE_API_KEY"]
-PINECONE_API_ENV = os.environ["PINECONE_API_ENV"]
-PINECONE_INDEX = os.environ["PINECONE_INDEX"]
+PINECONE_API_KEY = os.getenv("PINECONE_API_KEY")
+PINECONE_API_ENV = os.getenv("PINECONE_API_ENV")
+PINECONE_INDEX = os.getenv("PINECONE_INDEX")
 
 # initialize pinecone
 pinecone.init(
@@ -26,7 +26,7 @@ pinecone.init(
 index_name = PINECONE_INDEX
 vectorstore = Pinecone.from_existing_index(index_name=index_name, embedding=embeddings)
 
-api_key = os.environ["OPENAI_API_KEY"]
+api_key = os.getenv("OPENAI_API_KEY")
 
 
 class ChatWrapper: