from django.template.defaultfilters import slugify

    removelist = ["a", "an", "as", "at", "before", "but", "by", "for",\
    "from","is", "in", "into", "like", "of", "off", "on",\
    "onto","per","since", "than", "the", "this", "that",\
    "to", "up", "via","with"]

    new_topic = "this is a test with a long string which has many words up to here."

    clean_list = [str(word) for word in new_topic.split() if word not in removelist]

    new_slug = slugify(clean_list)