perplexity.py

from llama_index.llms.perplexity import Perplexity
from llama_index.core.llms import ChatMessage

def get_response_from_perplexity(question: str,  perplexity_key):

    # Initialize Perplexity LLM
    perplexity_llm = Perplexity(
        api_key=perplexity_key,
        model="sonar",
        temperature=0.2
    )
    messages_dict = [
        {"role": "system", "content": "answer in 2-3 sentences"},
        {"role": "user", "content": question},
    ]
    messages = [ChatMessage(**msg) for msg in messages_dict]
    response = perplexity_llm.chat(messages)
    return response