Pythonic way to check if a package is installed or not

Question

Pythonic way to check list of packages installed in Centos/Redhat?

In a bash script, I\'d do:

 rpm -qa | grep -w packagename

Answer 1

you can use Subprocess:

import subprocess
child = subprocess.Popen("rpm -qa | grep -w packagename", stdout=subprocess.PIPE, shell=True)
output = child.communicate()[0]
print output

using os:

import os
os.system("rpm -qa | grep -w packagename")