code: def get_screen_density(self) -> str:
          '''Show device screen density (PPI).'''
          output, _ = self._execute(
              '-s', self.device_sn, 'shell', 'wm', 'density')
          return output.split()[2f get_screen_density(self) -> str:
          '''Show device screen density (PPI).'''
          output, _ = self._execute(
              '-s', self.device_sn, 'shell', 'wm', 'density')
          return output.split()[2]
docs: Show device screen density (PPI).