code: def getparams(self):
      return _sunau_params(
          self.getnchannels(),
          self.getsampwidth(),
          self.getframerate(),
          self.getnframes(),
          self.getcomptype(),
          self.getcompname(),
      )
  
imports: from collections import namedtuple
  import warnings
label_desc: Use image node_id 18 for calling the Au_write obj's underlying member method code with example usage: obj.getparams() and returns: _sunau_params