import re
from unicodedata import normalize

_punct_re = re.compile(r'[\t !"#$%&\'()*\-/<=>?@\[\\\]^_`{|},.:]+')

def slugify(text, delim='-'):
    """Generates an slightly worse ASCII-only slug."""
    result = []
    for word in _punct_re.split(text.lower()):
        word = normalize('NFKD', word).encode('ascii', 'ignore')
        word = word.decode('utf-8')
        if word:
            result.append(word)
    return delim.join(result)

'''
> print (slugify('zażółć gęślą jaźń'))
> 'zazolc-gesla-jazn'
'''