code: def get_py_impl():
      
      if hasattr(sys, 'pypy_version_info'):
          pyimpl = 'PyPy'
      elif sys.platform.startswith('java'):
          pyimpl = 'Jython'
      elif sys.platform == 'cli':
          pyimpl = 'IronPython'
      else:
          pyimpl = 'CPython'
      return pyimpl
docs: Return what kind of Python this is