gtop.netlist() in python (and gtop.netload() probably too) should throw exception if /proc/net/dev cannot be read

Submitted by den..@..il.com

Description

If /proc/net/dev cannot be read (when only root can access it), then python binding of gtop prints:

glibtop: cannot open "/proc/net/dev": No such file or directory

in terminal when gtop.netlist() is called. It should throw an exception. Now it kinda impossible or too difficult to detect that /proc/net/dev cannot be read.

Using libgtop-python-2.30.2