examples/aflow/pubmedqa/optimized/round_2/graph.py

import evoagentx.workflow.operators as operator
import examples.aflow.pubmedqa.optimized.round_2.prompt as prompt_custom
from evoagentx.models.model_configs import LLMConfig
from evoagentx.benchmark.benchmark import Benchmark
from evoagentx.models.model_utils import create_llm_instance

class Workflow:
    
    def __init__(
        self,
        name: str,
        llm_config: LLMConfig,
        benchmark: Benchmark
    ):
        self.name = name
        self.llm = create_llm_instance(llm_config)
        self.benchmark = benchmark
        self.custom = operator.Custom(self.llm)
        self.answer_generate = operator.AnswerGenerate(self.llm)
        self.qas_ensemble = operator.QAScEnsemble(self.llm)  # Added QAScEnsemble operator
    
    async def __call__(self, problem: str):
        """
        Implementation of the workflow
        """
        solution = await self.answer_generate(input=problem)
        # Collect multiple solutions for ensemble
        solutions = [solution['answer']]  # Store the initial answer
        # Generate additional answers for better selection
        for _ in range(2):  # Generate two more answers
            additional_solution = await self.answer_generate(input=problem)
            solutions.append(additional_solution['answer'])
        # Use QAScEnsemble to select the best solution
        ensemble_result = await self.qas_ensemble(solutions=solutions)
        return ensemble_result['response']  # Return the best selected answer