ptyprocess.py 文件源码

def __init__(self, pid, fd):
        _make_eof_intr()  # Ensure _EOF and _INTR are calculated
        self.pid = pid
        self.fd = fd
        readf = io.open(fd, 'rb', buffering=0)
        writef = io.open(fd, 'wb', buffering=0, closefd=False)
        self.fileobj = io.BufferedRWPair(readf, writef)

        self.terminated = False
        self.closed = False
        self.exitstatus = None
        self.signalstatus = None
        # status returned by os.waitpid
        self.status = None
        self.flag_eof = False
        # Used by close() to give kernel time to update process status.
        # Time in seconds.
        self.delayafterclose = 0.1
        # Used by terminate() to give kernel time to update process status.
        # Time in seconds.
        self.delayafterterminate = 0.1