Use interned strings to optimise comparisons in settattro() of C implementation.
Use interned strings to optimise comparisons in settattro() of C implementation.

pombredanne/wrapt,ionelmc/python-lazy-object-proxy,linglaiyao1314/wrapt,GrahamDumpleton/wrapt,pombredanne/wrapt,wujuguang/wrapt,GrahamDumpleton/wrapt,ionelmc/python-lazy-object-proxy,github4ry/wrapt,github4ry/wrapt,akash1808/wrapt,wujuguang/wrapt,pombredanne/python-lazy-object-proxy,pombredanne/python-lazy-object-proxy,linglaiyao1314/wrapt,akash1808/wrapt