Custom Django Filters in Google Application Engine

Here is a very good description how can you use custom Django filters in Google Application Engine.

I've modified a filter found on Django Snippets to convert ISO8859-2 / ISO8859-1 strings into URL friendly strings:

match_non_alnum = re.compile("[^a-zA-Z0-9]+")

def dig_url_encode(string):

"""Converts common ISO88592/1 chars to ASCII and removes any special chars"""

r = {

u'á': u'a',

u'é': u'e',

u'í': u'i',

u'ó': u'o',

u'ö': u'o',

u'õ': u'o',

u'ő': u'o',

u'ú': u'u',

u'ü': u'u',

u'ű': u'u',

u'û': u'u',

u'Á': u'A',

u'É': u'E',

u'Í': u'I',

u'Ó': u'O',

u'Ö': u'O',

u'Ő': u'O',

u'Ú': u'U',

u'Ü': u'U',

u'Ű': u'U'

}

for key, value in r.items():

string = string.replace(key, value)

return match_non_alnum.sub(' ', string).strip().replace(' ', '_')