code: def _init_rabit():
      
      if _LIB is not None:
          _LIB.RabitGetRank.restype = ctypes.c_int
          _LIB.RabitGetWorldSize.restype = ctypes.c_int
          _LIB.RabitIsDistributed.restype = ctypes.c_int
          _LIB.RabitVersionNumber.restype = ctypes.c_int
docs: internal library initializer.