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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _open(file, mode='r', buffering=-1, encoding=None, errors=None, newline=None, closefd=True, opener=None, *, loop=None, executor=None):
 """Open an asyncio file."""

    if loop is None:
        loop = asyncio.get_event_loop()
    cb = partial(sync_open, file, mode=mode, buffering=buffering,
                 encoding=encoding, errors=errors, newline=newline,
                 closefd=closefd, opener=opener)
    f = yield from loop.run_in_executor(executor, cb)

    return wrap(f, loop=loop, executor=executor)