python xml validation with xsd file

Every year or so someone seems to ask the same question. Is there a good Python library to validate xml files comparing them to an xsd schema? The closest I've found is s开发者_StackOverflow中文版uggestions involving lxml, which unfortunately is not pure python (based on a few C libraries)

I would be surprised to find any pure Python XSD validation libraries. I am aware of the following alternatives for CPython, but they all depend on non-Python code:

• lxml (based on libxml2)
• libxml2 Python bindings
• XSV
• MSXML with PyWin32

I've used XSV for this. It's about four years since any active dev, but it works.