import os


def create_fds():
    pipes = []
    for i in range(10):
        (fd1, fd2) = os.pipe()
        pipes.append((os.fdopen(fd2, "wb"), os.fdopen(fd1, "rb")))
    return pipes


def filename(pipef):
    return 'pipe:[%d]' % os.fstat(pipef.fileno()).st_ino


def dump_opts(sockf):
    return []