Something

def flagmkey (filepath) :
    """add file to mrobotList if it doesn't contain name=keywords tag"""
    file = open(filepath, 'rb')
    html = file.read()
    file.close()
    p = re.compile(r'keywords', re.IGNORECASE)
    if p.match(html):
        print 'match'
        return
    else:
        print 'no match'
        mkeyList.append(filepath)