def page_down(self, n=1, interval=0, pre_dl=None, post_dl=None):
        """Pres page_down key n times.

        **中文文档**

        按 page_down 键n次。
        """
        self.delay(pre_dl)
        self.k.tap_key(self.k.page_down, n, interval)
        self.delay(post_dl)
def page_down ( self , n = 1 , interval = 0 , pre_dl = None , post_dl = None ) : self . delay ( pre_dl ) self . k . tap_key ( self . k . page_down , n , interval ) self . delay ( post_dl )
Pres page_down key n times.

        **中文文档**

        按 page_down 键n次。