Did you build the wx python library with cairo support? Did you
install it via PIL? If yes, did you have cairo dev libs installed?
More information would really help.
On the wx site this module is discussed here:-
http://www.wxpython.org/docs/api/wx.lib.wxcairo-module.html
The source tar ball is available there. I don't find a deb package though.
There is a python-cairo package,of course, but thats for directly
using the library.
Best Regards
Gajendra