code: def expandToInt4(qweight):
      eweight = qweight.repeat(8, axis=2)
      eweight = eweight.astype(np.uint32)
      for i in range(0, eweight.shape[2]):
          offset = i % (32 // 4) * 4
          eweight[:, :, i] = eweight[:, :, i] >> offset & (2**4 - 1)
      return eweight
  
file_path: BigDL/python/llm/src/bigdl/llm/gptq/convert/convert_gptq_to_ggml.py
imports: import os
  import re
  import sys
  import json
  import warnings
  import struct
  import numpy
  import torch
  from sentencepiece import SentencePieceProcessor
  from pathlib import Path
  from bigdl.llm.utils.common.log4Error import invalidInputError
label_desc: Use image node_id 3 for calling a global function with example usage: expandToInt4(qweight) and returns: eweight