code: def get_cpp_version(self, version: str) -> str:
      return f"cp{version.replace('.', '')}"
  
file_path: ray/ci/ray_ci/test_base.py
imports: import os
  import unittest
  from unittest.mock import patch
  from ci.ray_ci.builder_container import PYTHON_VERSIONS
  from ci.ray_ci.builder import DEFAULT_PYTHON_VERSION
label_desc: Use image node_id 5 for calling the RayCITestBase obj's underlying member method code with example usage: obj.get_cpp_version(version) and returns: str, version