I created a python software install with setup.py . In this software I use data files (XML file) when I install these xml file using setup.py then these files save with other files in /usr/lib/python2.7/site_packages/XYZ . But file permission set to these files (XML Files) rwx------ means only super user(root) can read these file I want to change the file permission of XML files as rwxr----- means current user can also read that file. How do I change the data files permission.
Login as root, and in the shell type :

chmod 744 yourfilename
set file permissions in setup.py file