class_docstr: log consumer that opens and writes to a Path 
docstr: write a message to the log 
code: def __call__(self, msg):
      """write a message to the log"""
      if not hasattr(self, "_file"):
          self._openfile()
      self._file.write(str(msg) + "\n")
      if not self._buffering:
          self._file.flush()
  
imports: import py
  import sys
label_desc: Use image node_id 3 for calling the Path obj's underlying member method code with example usage: obj.__call__(msg) without return types