This is based on ogcserver cgi wms handler.

simply import * from utils.py

and use like so:

def wms_view(request):
    class WMSFactory(BaseWMSFactory):
        def __init__(self):
            BaseWMSFactory.__init__(self)

            layer = mapnik.Layer('name')
            #important for some reason to initialize
            layer.wms_srs = None
            #everything like in ogcserver docs
    return ogc_response(request, WMSFactory())