thing.py

"""
usage:  thing.py t a g s -- machine names
"""
import sys

# get the tags and machine names, each separated by spaces.
# the two groups are separated by --
args = sys.argv[1:]


cut = args.index('--') if '--' in args else len(args)
goal_tags = set(args[:cut])
goal_machines = set(args[cut:])

for line in open('whatever-the-file-is.txt').read().split('\n'):
  line_name, line_tags = lines.split(' ',1)
  if line_name in goal_machines or not goal_machines:
    print line_name, ' '.join(t for t in line_tags.split(' ') if t in goal_tags)