futures_tpe.py

You can write the threaded example as:
  import concurrent.futures
  import itertools
  import random

  def generate_random(count):
    return [random.random() for _ in range(count)]

  if __name__ == "__main__":
    with concurrent.futures.ThreadPoolExecutor(max_workers=2) as executor:
      executor.submit(generate_random, 10000000)
      executor.submit(generate_random, 10000000)
    # I guess we don't care about the results...