little optmization: avoid to call os.path.realpath is not necessary
little optmization: avoid to call os.path.realpath is not necessary

peter-hst/psutil,stupidcache/psutil,jucapj/psutil,end18/psutil,marmolu/psutil,kiranvizru/psutil,zhengzheng/psutil,marmolu/psutil,nmani1905/psutil,jucapj/psutil,AlanZatarain/psutil,end18/psutil,djhaskin987/psutil,vmolsa/psutil,Alwnikrotikz/psutil,kiranvizru/psutil,AlanZatarain/psutil,google-code-export/psutil,vmolsa/psutil,end18/psutil,tigerneil/psutil,chjwang/psutil,creativewild/psutil,huson2012/psutil,peter-hst/psutil,creativewild/psutil,skyshe/psutil,google-code-export/psutil,PFZheng/psutil,kiranvizru/psutil,skyshe/psutil,zhengzheng/psutil,stupidcache/psutil,chjwang/psutil,end18/psutil,vmolsa/psutil,google-code-export/psutil,stupidcache/psutil,djhaskin987/psutil,tigerneil/psutil,nmani1905/psutil,kiranvizru/psutil,skyshe/psutil,anfedorov/psutil,Alwnikrotikz/psutil,huson2012/psutil,skyshe/psutil,vmolsa/psutil,PFZheng/psutil,djhaskin987/psutil,tigerneil/psutil,google-code-export/psutil,anfedorov/psutil,djhaskin987/psutil,tigerneil/psutil,huson2012/psutil,shiva21/psutil,shiva21/psutil,creativewild/psutil