Do you have /opt/rocks/lib/python2.6/site-packages on sys.path? Does your exread2.py file manipulate sys.path in any way? 2017. 05. 30. 10:18 keltezéssel, Mahmood Naderan via Python-list írta: > Hello, > Although I have installed a package via pip on a centos-6.6, python interpreter still says there is no such package!