code: def change_kernel(self, kernel_id, wait=True):
          
          return self._action('change_kernel', kernel=kernel_id, wait=wait)
docs: Change the kernel of this droplet
  
          Parameters
          ----------
          kernel_id: int
              Can be retrieved from output of self.kernels()
          wait: bool, default True
              Whether to block until the pending action is completed
  
          Raises
          ------
          APIError if region does not support private networking