# django
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger

# standard library


def paginate(request, objects, page_size=25):
    paginator = Paginator(objects, page_size)
    page = request.GET.get('p')

    try:
        paginated_objects = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer, deliver first page.
        paginated_objects = paginator.page(1)
    except EmptyPage:
        # If page is out of range (e.g. 9999), deliver last page of results.
        paginated_objects = paginator.page(paginator.num_pages)

    return paginated_objects


def clean_query_string(request):
    clean_query_set = request.GET.copy()

    clean_query_set = dict(
        (k, v) for k, v in request.GET.items() if not k.startswith('o_')
    )

    try:
        del clean_query_set['p']
    except:
        pass

    mstring = []
    for key in clean_query_set.keys():
        valuelist = request.GET.getlist(key)
        mstring.extend(['%s=%s' % (key, val) for val in valuelist])

    return '&'.join(mstring)

# django
from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger

# standard library


def paginate(request, objects, page_size=25):
    paginator = Paginator(objects, page_size)
    page = request.GET.get('p')

    try:
        paginated_objects = paginator.page(page)
    except PageNotAnInteger:
        # If page is not an integer, deliver first page.
        paginated_objects = paginator.page(1)
    except EmptyPage:
        # If page is out of range (e.g. 9999), deliver last page of results.
        paginated_objects = paginator.page(paginator.num_pages)

    return paginated_objects


def clean_query_string(request):
    clean_query_set = request.GET.copy()

    clean_query_set = dict(
        (k, v) for k, v in request.GET.items() if not k.startswith('o_')
    )

    try:
        del clean_query_set['p']
    except:
        pass

    mstring = []
    for key in clean_query_set.iterkeys():
        valuelist = request.GET.getlist(key)
        mstring.extend(['%s=%s' % (key, val) for val in valuelist])

    return '&'.join(mstring)

--- 
+++ 
@@ -33,7 +33,7 @@
         pass
 
     mstring = []
-    for key in clean_query_set.iterkeys():
+    for key in clean_query_set.keys():
         valuelist = request.GET.getlist(key)
         mstring.extend(['%s=%s' % (key, val) for val in valuelist])
 
Use keys instead of iterkeys to go through all keys on clean_query_set
