fdpexpect.py 文件源码

def __init__ (self, fd, args=None, timeout=30, maxread=2000, searchwindowsize=None,
                  logfile=None, encoding=None, codec_errors='strict'):
        '''This takes a file descriptor (an int) or an object that support the
        fileno() method (returning an int). All Python file-like objects
        support fileno(). '''

        if type(fd) != type(0) and hasattr(fd, 'fileno'):
            fd = fd.fileno()

        if type(fd) != type(0):
            raise ExceptionPexpect('The fd argument is not an int. If this is a command string then maybe you want to use pexpect.spawn.')

        try: # make sure fd is a valid file descriptor
            os.fstat(fd)
        except OSError:
            raise ExceptionPexpect('The fd argument is not a valid file descriptor.')

        self.args = None
        self.command = None
        SpawnBase.__init__(self, timeout, maxread, searchwindowsize, logfile,
                           encoding=encoding, codec_errors=codec_errors)
        self.child_fd = fd
        self.own_fd = False
        self.closed = False
        self.name = '<file descriptor %d>' % fd