Method pre_cmd

IPython/lib/demo.py:620–625

Method called before executing each block. This one simply clears the screen.

(self)

        return ''

    def pre_cmd(self):
        """Method called before executing each block.

        This one simply clears the screen."""
        from IPython.utils.terminal import _term_clear
        _term_clear()

class ClearDemo(ClearMixin,Demo):
    pass