parses zopes instance file and returns versions used (for use in buildout)

versionfinder.py

# versionfinder 
import re
regexp = re.compile('.*\/(.*)-(.*)-py')

with open('instance', 'r') as ins:
    for line in ins.readlines():
        res = regexp.match(line)
        if res is None:
            continue
        print "%s = %s" % res.groups()