class_docstr: log consumer wrapping a file(-like) object 
docstr: write a message to the log 
code: def __call__(self, msg):
      """write a message to the log"""
      self._file.write(str(msg) + "\n")
      if hasattr(self._file, "flush"):
          self._file.flush()
  
imports: import py
  import sys
label_desc: Use image node_id 2 for calling the File obj's underlying member method code with example usage: obj.__call__(msg) without return types