feat: function page_count and page_item_count finished

src/codewars/kata_pagination_helper.py

@@ -15,12 +15,22 @@ class PaginationHelper:
 
     # returns the number of pages
     def page_count(self):
-        return self.items_per_page // len(self.collection)
+        return int(len(self.collection) / self.items_per_page) + (
+            len(self.collection) % self.items_per_page > 0
+        )
 
     # returns the number of items on the given page. page_index is zero based
     # this method should return -1 for page_index values that are out of range
     def page_item_count(self, page_index):
-        pass
+        if page_index < 0 or self.page_count() - 1 < page_index:
+            return -1
+
+        if page_index == 0:
+            return len(self.collection[: self.items_per_page])
+
+        return self.collection[
+            self.items_per_page * page_index : self.items_per_page * page_index * 2
+        ]
 
     # determines what page an item at the given index is on. Zero based indexes.
     # this method should return -1 for item_index values that are out of range
@@ -28,7 +38,8 @@ class PaginationHelper:
         pass
 
 
-collection = ["a", "b", "c", "d", "e", "f"]
+collection = ["a", "b", "c", "d", "e", "f", "g", "h", "i", "j"]
 helper = PaginationHelper(collection, 4)
 
 print(helper.page_count())
+print(helper.page_item_count(2))