style(factory): format import statements for better readability

from __future__ import annotations

import logging

from concurrent.futures import Executor, ProcessPoolExecutor, ThreadPoolExecutor

from concurrent.futures import (Executor, ProcessPoolExecutor,

                                ThreadPoolExecutor)

from typing import Any

from .serial import SerialPoolExecutor

from __future__ import annotations

import time

from concurrent.futures import (

    ProcessPoolExecutor,

    ThreadPoolExecutor,

    as_completed,

)

from concurrent.futures import (ProcessPoolExecutor, ThreadPoolExecutor,

                                as_completed)

from functools import partial

try:

import pytest

from pool_executors.pool_executors import ExecutorType, SerialPoolExecutor, create_executor

from pool_executors.pool_executors import (ExecutorType, SerialPoolExecutor,

                                           create_executor)

class TestSerialFuture: