code: def signal(signalnum, handler):
      handler = _signal.signal(
          _enum_to_int(signalnum), _enum_to_int(handler)
      )
      return _int_to_enum(handler, Handlers)
  
file_path: catboost/contrib/tools/python3/src/Lib/signal.py
imports: import _signal
  from _signal import *
  from enum import IntEnum
label_desc: Use image node_id 4 for calling a global function with example usage: signal(signalnum, handler) and returns: _int_to_enum