class_docstr: Fits and applies PCA whitening
code: def to_cuda(self):
      self.mean = self.mean.cuda()
      self.DVt = self.DVt.cuda()
  
file_path: vissl/vissl/utils/pca.py
imports: import logging
  from typing import Union
  import numpy
  import torch
  from vissl.utils.io import load_file, save_file
label_desc: Use image node_id 3 for calling the PCA obj's underlying member method code with example usage: obj.to_cuda() without return types