Pagination on GAE python with webapp

I don't know how to deal with session with webapp. So I just add all past stacks as a string with delimiter /, and pass it to the template.

test.py

cursors = self.request.get('cursors')
if cursors:
    list_cursors = cursors.split('/')
    query.with_cursor(list_cursors[-1])
    list_cursors.pop()
    result['previous_cursors'] = '/'.join(list_cursors)

result['has_search_result'] = True
result['query_results'] = [m for m in query.run(limit=LIST_LIMIT)]
result['next_cursors'] = cursors + '/' + query.cursor()

query.with_cursor(query.cursor())
has_next = False
for m in query.run(limit=1):
        has_next = True

result['has_next'] = has_next

test.html

{% if previous_cursors != None %}
  <form action="/admin/expenses" method="get" role="form">
    <input name="email" class="form-control" type="hidden" value={{email}}>
    <input name="cursors" class="form-control" type="hidden" value={{previous_cursors}}>
    <button type="submit" class="btn btn-success ml-2">Previous</button>
  </form>
{% endif %}
{% if has_next %}
  <form action="/admin/expenses" method="get" role="form">
  <input name="email" class="form-control" type="hidden" value={{email}}>
  <input name="cursors" class="form-control" type="hidden" value={{next_cursors}}>
  <button type="submit" class="btn btn-success ml-2">Next</button>
  </form>
{% endif %}