code: def flush(self):
      if hasattr(self._out, "flush"):
          self._out.flush()
  
file_path: chainer/chainer/training/extensions/util.py
imports: import collections
  import os
  import sys
  import time
label_desc: Use image node_id 8 for calling the ProgressBar obj's underlying member method code with example usage: obj.flush() without return types