class_docstr: log consumer that opens and writes to a Path 
code: def _openfile(self):
      mode = self._append and "a" or "w"
      f = open(self._filename, mode)
      self._file = f
  
imports: import py
  import sys
label_desc: Use image node_id 2 for calling the Path obj's underlying member method code with example usage: obj._openfile() without return types