[Zope] Creating ZClass from Python Script

I looked through the archives but could find something specific to my scenario. How would you create a ZClass programatically from an external python method with only the ZClass name as string? Is that even possible? I am trying to write an external method that can import a csv file into a ZClass that you specify. I am pretty close, but getting hung up on how to create the ZClass? Thanks in advance. Chris