Update app.py

app.py

@@ -8,7 +8,7 @@ from langchain.chat_models import ChatOpenAI
 import os
 from langchain.agents import ZeroShotAgent, Tool, AgentExecutor
 from langchain import OpenAI,LLMChain
-openai.api_key= os.environ.get("openai.api_key")
+openai_api_key= os.environ.get("openai.api_key")
 prefix = """
 Hi! I'm a data analysis bot. I can help you perform basic exploratory data analysis (EDA) on your pandas dataframe.