def _rc_sdiffstore(self, dst, src, *args):
args = list_or_args(src, args)<EOL>result = self.sdiff(*args)<EOL>if result is not set([]):<EOL><INDENT>return self.sadd(dst, *list(result))<EOL><DEDENT>return <NUM_LIT:0><EOL>
Store the difference of sets ``src``,  ``args`` into a new
set named ``dest``.  Returns the number of keys in the new set.