Pexpect asyncio integration attempt

pexpect_async.py

import asyncio

import pexpect
from pexpect.async import expect_async

p = pexpect.spawn('python')
p.setecho(False)
p.waitnoecho()
b = pexpect.spawn('bash')
b.setecho(False)
b.waitnoecho()

p.expect_exact('>>> ')
b.expect_exact("$ ")

p.sendline("import time; time.sleep(4); print('done')")
b.sendline("sleep 2 && echo 'done'")

@asyncio.coroutine
def wait_python():
    yield from expect_async(p, 'done')
    print("Python done")

@asyncio.coroutine
def wait_bash():
    yield from expect_async(b, 'done')
    print("Bash done")

loop = asyncio.get_event_loop()
loop.run_until_complete(asyncio.gather(wait_python(), wait_bash()))