code: def get_version() -> str:
      """
      This function reads the version.txt and generates the colossalai/version.py file.
  
      Returns:
          The library version stored in version.txt.
      """
  
      setup_file_path = os.path.abspath(__file__)
      project_path = os.path.dirname(setup_file_path)
      version_txt_path = os.path.join(project_path, "version.txt")
      version_py_path = os.path.join(
          project_path, "colossalai/version.py"
      )
  
      with open(version_txt_path) as f:
          version = f.read().strip()
  
      # write version into version.py
      with open(version_py_path, "w") as f:
          f.write(f"__version__ = '{version}'\n")
  
          # look for pytorch and cuda version
          if BUILD_CUDA_EXT:
              torch_major, torch_minor, _ = get_pytorch_version()
              torch_version = f"{torch_major}.{torch_minor}"
              cuda_version = ".".join(
                  get_cuda_bare_metal_version(CUDA_HOME)
              )
          else:
              torch_version = None
              cuda_version = None
  
          # write the version into the python file
          if torch_version:
              f.write(f'torch = "{torch_version}"\n')
          else:
              f.write("torch = None\n")
  
          if cuda_version:
              f.write(f'cuda = "{cuda_version}"\n')
          else:
              f.write("cuda = None\n")
  
      return version
  
file_path: colossalai/setup.py
imports: import os
  import sys
  from datetime import datetime
  from typing import List
  from setuptools import find_packages, setup
  from op_builder.utils import check_cuda_availability, check_pytorch_version, check_system_pytorch_cuda_match, get_cuda_bare_metal_version, get_pytorch_version, set_cuda_arch_list
label_desc: Use image node_id 4 for calling a global function with example usage: get_version() and returns: version