Read image XMP data in Python

Question

Can I use PIL, like in this example?

I only need to read the data, and I'm looking for the easiest simplest way to do it (I can't install pyexiv).

edit: I don't want to believe that the only way to do this is with some library (python-xmp-toolkit, pyexiv2, ...) that needs Exempi and Boost. There must be another option!