from noc.inv.models import *
@pyrule
def rule(managed_object, config):
    good = ['service password-encryption']

    for gline in good:
        if gline not in config:
            diff += [gline]

    if len(diff) > 0:
        result = ["\nConfig not valid, fix it:\n\n" + "\n".join(diff)]
    return result