code: def _load_cdll(name):
      
      # our custom defined part of the extension file name
      libname = _get_lib_name(name)
      libdir = os.path.join(os.path.dirname(__file__), 'lib')
      libpath = os.path.join(libdir, libname)
      static_fftw = os.path.join(libdir, 'libfftw3-3.dll')
      static_fftwf = os.path.join(libdir, 'libfftw3f-3.dll')
      try:
          fftw_lib = ctypes.CDLL(str(static_fftw))  # noqa: F841
          fftwf_lib = ctypes.CDLL(str(static_fftwf))  # noqa: F841
      except:
          pass
      try:
          cdll = ctypes.CDLL(str(libpath))
      except Exception as e:
          msg = 'Could not load shared library "%s".\n\n %s' % (libname, str(e))
          raise ImportError(msg)
      return cdll
docs: Helper function to load a shared library built during installation
      with ctypes.
  
      :type name: str
      :param name: Name of the library to load (e.g. 'mseed').
      :rtype: :class:`ctypes.CDLL`