Special Slugifying German Text in Python (works pretty good actually)

slugify.py

# -*- coding: utf-8 -*-
def replace_all(text, dic):
    for replace_with, replace_what in dic.iteritems():
        if type(replace_what) is list:
            for letter in replace_what:
                text = text.replace(letter,replace_with)
        else:
            text = text.replace(replace_what, replace_with)
    return text

#example input: ssdfSERFS - ^#$%43 GSDG  ____ :VKbm sdF öüoäßßEF_____-___ d a s d _e <>DFGDFG????
#example output: ssdfserfs-43-gsdg-vkbm-sdf-oeueoaessssef-d-a-s-d-e-dfgdfg
def slugify(string,params = []):
    import re
    #unescape html entity signs (e.g. &amp; -> &) & lowercase string
    import HTMLParser 
    string = HTMLParser.HTMLParser().unescape(string).lower()
    translation_dic = {
           'ae' : ['Ä','ä','&Auml;','&auml;'],
           'oe' : ['Ö','ö','&Ouml;','&ouml;'],
           'ue' : ['Ü','ü','&Uuml;','&uuml;'],
           'ss' : ['ß','&szlig;'],
    }
    string = replace_all(string,translation_dic)
    string = re.sub(r'[^a-zA-Z0-9\_\-\s]','',string)
    string = re.sub(r'[\s]{2,}',' ',string)
    string = string.replace(' ','-').replace('_','-').strip(' -')
    string = re.sub(r'[\-]{2,}','-',string)
    
    return string