The Magick++ API has likely not kept up with ImageMagick API changes. The ImageMagick API is still available via a MagickLib namespace and if you study how the Magick++ Image class works, you will see that it is possible to use the C API and pass the result into Image. It might be possible to inherit from Magick++ Image and add new methods that way.
PythonMagick is based on the Magick++ API so it supports what Magick++ does.
Bob Friesenhahn (Magick++ author)