from concurrent.futures import ThreadPoolExecutor, as_completed

def work(arg):
  """do work here"""
  pass

def main():
  args =["initial", "arguments"]
  with ThreadPoolExecutor(max_workers=10) as executor:
    futures = [executor.submit(work, arg, "optional", "arguments") for arg in args]

    result = [future.result() for future in as_completed(futures)]