code: def __str__(self):
      s = super(CalledProcessError, self).__str__()
      return "%s [stderr: %r]" % (s, self.stderr)
  
imports: import errno
  import logging
  import os
  import platform
  import re
  import subprocess
  from .None import _compat
  from .None import tools
label_desc: Use image node_id 1 for calling the CalledProcessError obj's underlying member method code with example usage: obj.__str__() and returns: unknown