class_docstr: (deprecated) Log producer API which sends messages to be logged
  to a 'consumer' object, which then prints them to stdout,
  stderr, files, etc. Used extensively by PyPy-1.1.
docstr: write a message to the appropriate consumer(s) 
code: def __call__(self, *args):
      """write a message to the appropriate consumer(s)"""
      func = self._keywordmapper.getconsumer(self._keywords)
      if func is not None:
          func(self.Message(self._keywords, args))
  
imports: import py
  import sys
label_desc: Use image node_id 4 for calling the Producer obj's underlying member method code with example usage: obj.__call__() without return types