They haven't gotten rid of the Python. It's just that the lineup now is Cobra, then Python, then Anaconda.
I have the Cobras and I find them fantastic. Now that Shunyata can measure the effects of its power cables, they've been able to produce a cord that costs less than the CX did new, but is quite a leap. I still have a Python CX, a Black Mamba and 2 Cobras. I can simply switch out the Python CX with a Cobra on the CD player and hear a considerable improvement in lowering the noise floor, purity of sound (in other words, instruments have even less "fuzz" on them, most easily heard on violins) and a beautiful - but not "romantic" sound. I'm listening to Natalie Dessay and both the timbre of her voice, as well as the orchestral instrumentation is pretty stunning. And there's more "kick" to the sound (or "punch" if you prefer).
I'd listen to the Cobra. If one can afford it, I'm sure the Python is even better, but I can't imagine any significant complaints about the Cobra. I don't hear anything to complain about and my cables are not quite a week old.
Robert Harley wrote about the speaker cable and interconnects, noting that they among the very best around, and now the same can be said also be said about the (matching) Zi-Tron power cord line.
