code: def reset_buffer(self):
      with self.buffer_lock:
          self.buffer.truncate(0)
          self.buffer.seek(0)
  
imports: from __future__ import print_function
  import glob
  from io import BytesIO
  import os
  import os.path
  import sys
  from threading import Thread, Lock, Event
  import warnings
  import nose.plugins.builtin
  from nose.plugins.xunit import Xunit
  from nose import SkipTest
  from nose.core import TestProgram
  from nose.plugins import Plugin
  from nose.util import safe_str
  from IPython import version_info
  from IPython.utils.py3compat import bytes_to_str
  from IPython.utils.importstring import import_item
  from IPython.testing.plugin.ipdoctest import IPythonDoctest
  from IPython.external.decorators import KnownFailure, knownfailureif
label_desc: Use image node_id 3 for calling the StreamCapturer obj's underlying member method code with example usage: obj.reset_buffer() without return types