title: decorators in the python standard lib (@deprecated specifically)
body: <p>I need to mark routines as deprecated, but apparently there's no standard library decorator for deprecation. I am aware of recipes for it and the warnings module, but my question is: why is there no standard library decorator for this (common) task ? </p>
  
  <p>Additional question: are there standard decorators in the standard library at all ?</p>