spinner.py 文件源码

def __init__(self, stream, charset=None):
        # our Enterprise logic follows
        self.stream_isatty = stream.isatty()
        if charset is None:
            charset = ENTERPRISE_CHARSET if self.stream_isatty else '.'

        super(QubesSpinnerEnterpriseEdition, self).__init__(stream, charset)

        if self.stream_isatty:
            try:
                curses.setupterm()
                self.has_terminfo = True
                self.cub1 = curses.tigetstr('cub1').decode()
            except (curses.error, io.UnsupportedOperation):
                # we are in very non-Enterprise environment
                self.has_terminfo = False
        else:
            self.cub1 = ''