No, and if they do there may be a dehydration issue, lack of heat or lack of proper food. If you are feeding every 1 - 2 weeks and the snake is not shedding at least every 3 months you should consult...
Brush them often. Some cats don't like this, however. If you really love cats, but hate the shedding, you could also adopt a Sphinx, which are hairless.give them a bath, it gets out all the old oil...