code: def alt_fn(self, i, pre_dl=None, post_dl=None):
          
          self.delay(pre_dl)
          self.k.press_key(self.k.alt_key)
          self.k.tap_key(self.k.function_keys[i])
          self.k.release_key(self.k.alt_key)
          self.delay(post_dl)
docs: Press Alt + Fn1 ~ 12 once.
  
          **中文文档**
  
          按下 Alt + Fn1 ~ 12 组合键。