quivr/backend/llm/utils/summarization.py

import os

import guidance
import openai
from logger import get_logger

logger = get_logger(__name__)

openai_api_key = os.environ.get("OPENAI_API_KEY")
openai.api_key = openai_api_key
summary_llm = guidance.llms.OpenAI("gpt-3.5-turbo-0613", caching=False)


def llm_summerize(document):
    summary = guidance(
        """
{{#system~}}
You are a world best summarizer. \n
Condense the text, capturing essential points and core ideas. Include relevant \
examples, omit excess details, and ensure the summary's length matches the \
original's complexity.
{{/system~}}
{{#user~}}
Summarize the following text:
---
{{document}}
{{/user~}}

{{#assistant~}}
{{gen 'summarization' temperature=0.2 max_tokens=100}}
{{/assistant~}}
""",
        llm=summary_llm,
    )

    summary = summary(document=document)
    logger.info("Summarization: %s", summary)
    return summary["summarization"]


def llm_evaluate_summaries(question, summaries, model):
    if not model.startswith("gpt"):
        logger.info(f"Model {model} not supported. Using gpt-3.5-turbo instead.")
        model = "gpt-3.5-turbo-0613"
    logger.info(f"Evaluating summaries with {model}")
    evaluation_llm = guidance.llms.OpenAI(model, caching=False)
    evaluation = guidance(
        """
{{#system~}}
You are a world best evaluator. You evaluate the relevance of summaries based \
on user input question. Return evaluation in following csv format, csv headers \
are [summary_id,document_id,evaluation,reason].
Evaluator Task
- Evaluation should be a score number between 0 and 5.
- Reason should be a short sentence within 20 words explain why the evaluation.
---
Example
summary_id,document_id,evaluation,reason
1,4,3,"not mentioned about topic A"
2,2,4,"It is not relevant to the question"
{{/system~}}
{{#user~}}
Based on the question, do Evaluator Task for each summary.
---
Question: {{question}}
{{#each summaries}}
Summary
    summary_id: {{this.id}}
    document_id: {{this.document_id}}
    evaluation: ""
    reason: ""
    Summary Content: {{this.content}}
    File Name: {{this.metadata.file_name}}
{{/each}}
{{/user~}}
{{#assistant~}}
{{gen 'evaluation' temperature=0.2 stop='<|im_end|>'}}
{{/assistant~}}
""",
        llm=evaluation_llm,
    )
    result = evaluation(question=question, summaries=summaries)
    evaluations = {}
    for evaluation in result["evaluation"].split("\n"):
        if evaluation == "" or not evaluation[0].isdigit():
            continue
        logger.info("Evaluation Row: %s", evaluation)
        summary_id, document_id, score, *reason = evaluation.split(",")
        if not score.isdigit():
            continue
        score = int(score)
        if score < 3 or score > 5:
            continue
        evaluations[summary_id] = {
            "evaluation": score,
            "reason": ",".join(reason),
            "summary_id": summary_id,
            "document_id": document_id,
        }
    return [
        e
        for e in sorted(
            evaluations.values(), key=lambda x: x["evaluation"], reverse=True
        )
    ]