code: def read_value(self):
      value_type = self.read_i32()
      value = self.funcs[value_type]()
      return value
  
imports: import struct
  import functools
  import torch
  import numpy
  from io import BufferedReader
  from tqdm import tqdm
  from bigdl.llm.utils.common import invalidInputError
label_desc: Use image node_id 2 for calling the GGUFReader obj's underlying member method code with example usage: obj.read_value() and returns: value