import pandas as pd import numpy as np from openai import OpenAI   # Load & clean data df = pd.read_csv(   'data.csv') df.dropna(inplace=True)   # Embeddings→VectorDB embeddings = embed(   df['text'].tolist())   # RAG + Agent agent = ReActAgent(   llm=OpenAI(),   tools=[rag_tool]) result = agent.run(   "Analyse sales")