Code for Proper Pagination Article (https://medium.com/@sumitlni/paginate-properly-please-93e7ca776432) on Medium

paginator_template.html

{% if is_paginated %}
    {% load proper_paginate %}
    {% load url_replace %}
    <ul class="pagination">
        {% if page_obj.number == 1 %}
            <li class="disabled"><span>⇤</span></li>
        {% else %}
            <li><a class="page-link" href="?{% url_replace request 'page' 1 %}">⇤</a></li>
        {% endif %}
        {% if page_obj.has_previous %}
            <li><a class="page-link" href="?{% url_replace request 'page' page_obj.previous_page_number %}">&laquo;</a></li>
        {% else %}
            <li class="disabled"><span>&laquo;</span></li>
        {% endif %}
        {% for i in paginator|proper_paginate:page_obj.number %}
            {% if page_obj.number == i %}
                <li class="active"><span>{{ i }} <span class="sr-only">(current)</span></span></li>
            {% else %}
                <li><a class="page-link" href="?{% url_replace request 'page' i %}">{{ i }}</a></li>
            {% endif %}
        {% endfor %}
        {% if page_obj.has_next %}
            <li><a class="page-link" href="?{% url_replace request 'page' page_obj.next_page_number %}">&raquo;</a></li>
        {% else %}
            <li class="disabled"><span>&raquo;</span></li>
        {% endif %}
        {% if page_obj.number == paginator.num_pages %}
            <li class="disabled"><span>⇥</span></li>
        {% else %}
            <li><a class="page-link" href="?{% url_replace request 'page' paginator.num_pages %}">⇥</a></li>
        {% endif %}
    </ul>
{% endif %}

proper_paginate.py

from django import template

register = template.Library()


@register.filter(name='proper_paginate')
def proper_paginate(paginator, current_page, neighbors=10):
    if paginator.num_pages > 2*neighbors:
        start_index = max(1, current_page-neighbors)
        end_index = min(paginator.num_pages, current_page + neighbors)
        if end_index < start_index + 2*neighbors:
            end_index = start_index + 2*neighbors
        elif start_index > end_index - 2*neighbors:
            start_index = end_index - 2*neighbors
        if start_index < 1:
            end_index -= start_index
            start_index = 1
        elif end_index > paginator.num_pages:
            start_index -= (end_index-paginator.num_pages)
            end_index = paginator.num_pages
        page_list = [f for f in range(start_index, end_index+1)]
        return page_list[:(2*neighbors + 1)]
    return paginator.page_range

url_replace.py

from django import template

register = template.Library()


@register.simple_tag
def url_replace(request, field, value):
    query_string = request.GET.copy()
    query_string[field] = value
    
    return query_string.urlencode()