calc.py 文件源码

def _get_at_pos(self, pos):
        i, sub = pos
        assert sub in (0,1,2)
        if i < 0 or i >= len(self.content):
            return None, None
        if sub == 0:
            edit = self.content[i].edit
            return urwid.AttrWrap(edit, 'edit', 'editfocus'), pos
        elif sub == 1:
            return self.div, pos
        else:
            return self.content[i].result, pos