provide better error msg
provide better error msg

jamesblunt/psutil,jamesblunt/psutil,msarahan/psutil,qbit/psutil,mrjefftang/psutil,mrjefftang/psutil,jamesblunt/psutil,giampaolo/psutil,qbit/psutil,cloudbase/psutil,cloudbase/psutil,packages/psutil,Q-Leap-Networks/psutil,0-wiz-0/psutil,jorik041/psutil,packages/psutil,packages/psutil,msarahan/psutil,jorik041/psutil,qbit/psutil,mrjefftang/psutil,Q-Leap-Networks/psutil,0-wiz-0/psutil,jorik041/psutil,cloudbase/psutil,msarahan/psutil,giampaolo/psutil