main.py

import math


class Pagination:
    def __init__(self, item_list, per_page):
        self.item_list = item_list
        self.per_page = per_page
        self.total_items = len(item_list)
        self.total_pages = math.ceil(self.total_items / per_page)

    def getPage(self, pageno):
        pageno = pageno if pageno < self.total_pages else self.total_pages
        from_no = (pageno - 1) * self.per_page
        if pageno == self.total_pages and self.total_items % self.per_page > 0:
            to_no = (pageno * self.per_page) - self.total_items % self.per_page
        else:
            to_no = pageno * self.per_page
        next_page = pageno + 1 if pageno < self.total_pages else self.total_pages
        previous_page = pageno - 1 if pageno != 1 else 1
        show_next = False if (pageno == self.total_pages) else True
        show_previous = False if (pageno == 1) else True
        return {"results": self.item_list[from_no:to_no],

                "controls": {"total_pages": self.total_pages,
                             "show_next": show_next,
                             "show_previous": show_previous,
                             "total_items": self.total_items,
                             "current_page": pageno,
                             "next_page": next_page,
                             "previous_page": previous_page
                             }}




pageno = 3
animals = ["cat", "dog", "cow", "goat", "sheep"]
perpage = 2

p = Pagination(animals, per_page=perpage)
print(p.getPage(pageno))

# total_animals = len(animals)
# total_pages = math.ceil(total_animals/perpage)
#
# pageno = pageno if pageno < total_pages else total_pages
# # print(total_pages)
# start_val = (pageno - 1) * perpage
#
# reminder = total_animals % perpage
#
# if pageno == total_pages and reminder > 0:
#     stop_val = pageno * perpage - reminder
# else:
#     stop_val = pageno * perpage
#
# # print(stop_val)
# page = animals[start_val:stop_val] # page 1
# print(page)