code: def getcompname(self):
      if self._comptype == "ULAW":
          return "CCITT G.711 u-law"
      elif self._comptype == "ALAW":
          return "CCITT G.711 A-law"
      else:
          return "not compressed"
  
imports: from collections import namedtuple
  import warnings
label_desc: Use image node_id 16 for calling the Au_write obj's underlying member method code with example usage: obj.getcompname() and returns: str, str, str