pitrou

import threading

from tornado import gen
from tornado.concurrent import Future
from tornado.ioloop import IOLoop


fut = Future()
#print("in main:", fut, id(getattr(fut, '_loop', None)))

pitrou

import gc
import pprint
import types
import weakref

import asyncio
from asyncio import tasks

from tornado import gen
from tornado.ioloop import IOLoop

pitrou

import itertools
import random


def mytee1(xs, n):
    last = [None, None]

    def gen(it, mylast):
        nonlocal last

pitrou

import gc
import sys
import time
import itertools
import weakref
import concurrent.futures
import tracemalloc
import ctypes