code: def __exit__(self, *args):
      self.append(
          self._stringio.getvalue() + self._stringioerr.getvalue()
      )
      del self._stringio, self._stringioerr  # free up some memory
      sys.stdout = self._stdout
      sys.stderr = self._stderr
  
imports: import os
  import pytest
  import subprocess
  from io import StringIO
  import sys
  from fastNLP.core.utils.cache_results import cache_results
  from fastNLP.envs.distributed import rank_zero_rm
label_desc: Use image node_id 2 for calling the Capturing obj's underlying member method code with example usage: obj.__exit__() without return types