Source code for deephyper.evaluator._process_pool

import logging
import asyncio
import functools

from deephyper.evaluator._evaluator import Evaluator

from concurrent.futures import ProcessPoolExecutor

logger = logging.getLogger(__name__)


[docs]class ProcessPoolEvaluator(Evaluator): """This evaluator uses the ``ProcessPoolExecutor`` as backend. Args: run_function (callable): functions to be executed by the ``Evaluator``. num_workers (int, optional): Number of parallel processes used to compute the ``run_function``. Defaults to 1. callbacks (list, optional): A list of callbacks to trigger custom actions at the creation or completion of jobs. Defaults to None. """ def __init__( self, run_function, num_workers: int = 1, callbacks: list = None, run_function_kwargs: dict = None, ): super().__init__(run_function, num_workers, callbacks, run_function_kwargs) self.sem = asyncio.Semaphore(num_workers) #! creating the exector once here is crutial to avoid repetitive overheads self.executor = ProcessPoolExecutor(max_workers=num_workers) if hasattr(run_function, "__name__") and hasattr(run_function, "__module__"): logger.info( f"ProcessPool Evaluator will execute {self.run_function.__name__}() from module {self.run_function.__module__}" ) else: logger.info(f"ProcessPool Evaluator will execute {self.run_function}")
[docs] async def execute(self, job): async with self.sem: run_function = functools.partial( job.run_function, job.config, **self.run_function_kwargs ) sol = await self.loop.run_in_executor(self.executor, run_function) job.result = sol return job