Skjolberg

# copied from https://github.com/tulir/mautrix-telegram/blob/master/mautrix_telegram/util/parallel_file_transfer.py
# Copyright (C) 2021 Tulir Asokan
import asyncio
import hashlib
import inspect
import logging
import math
import os
from collections import defaultdict
from typing import Optional, List, AsyncGenerator, Union, Awaitable, DefaultDict, Tuple, BinaryIO