dpkg -l between servers and compare them (work in progress)

find_difference.py

#!/usr/bin/env python

pkg_a = {}
pkg_b = {}

def create_pkg_list(a):
    pkg = {}
    with open(a) as f:
        for line in f.readlines():
            component = filter(lambda x: x != '', line.split(' '))

            pkg[component[1]] = component[2]

    return pkg

if __name__ == '__main__':
    import sys

    if len(sys.argv) < 3:
        print >> sys.stderr, 'usage: %s <file1> <file2>' % sys.argv[0]
        sys.exit(0)

    pkg_a = create_pkg_list(sys.argv[1])
    pkg_b = create_pkg_list(sys.argv[2])

    for key in pkg_a.keys():
        pkg_b_value = pkg_b.get(key, None)
        if pkg_b_value and pkg_b_value != pkg_a[key]:
            print "%s\t\t\t\t\t%s\t%s" % (
                key[:16],
                pkg_a[key],
                pkg_b_value
            )