Update app.py

app.py

@@ -3,7 +3,7 @@ import zipfile
 import gradio as gr
 from langchain_openai import ChatOpenAI
 from langchain.embeddings import HuggingFaceEmbeddings
-from langchain.vectorstores import Chroma
+from langchain_chroma import Chroma
 from langchain.prompts import PromptTemplate
 from langchain.chains import LLMChain
 
@@ -18,7 +18,7 @@ vectordb = Chroma(persist_directory="geometry_chroma", embedding_function=embedd
 retriever = vectordb.as_retriever()
 
 # Set OpenAI key (use Secrets or .env later)
-os.environ["OPENAI_API_KEY"] = os.getenv("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")
+os.environ["OPENAI_API_KEY"] = os.getenv("OPENAI_API_KEY")
 
 llm = ChatOpenAI(model_name="gpt-3.5-turbo", temperature=0.2)