re-establish python 2.4 compatibility
re-establish python 2.4 compatibility

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