Debug mode for bigsuds library?

Hi,

 

I'm trying to get the raw XML input/output of calls to the iControl URL endpoint from bigsuds so I can write unit tests. I've noticed a "debug" argument in the init method, but this doesn't seem to have the result I'm looking for, which is to have the complete HTTP request/response logged (either to stdout, or to a file). Is there something I'm missing?