code: def _num_cpus_windows():
      """Return the number of active CPUs on a Windows system."""
      return os.environ.get("NUMBER_OF_PROCESSORS")
  
file_path: catboost/contrib/python/ipython/py2/IPython/utils/sysinfo.py
imports: import os
  import platform
  import pprint
  import sys
  import subprocess
  from IPython.core import release
  from IPython.utils import py3compat, _sysinfo, encoding
label_desc: Use image node_id 7 for calling a global function with example usage: _num_cpus_windows() and returns: os