implement deletion of single checklist items

test/test_checklist.py

@@ -81,6 +81,21 @@ def test_checklist_rename(self):
         self.assertEqual(len(card.checklists), 1)
         self.assertEqual(card.checklists[0].name, new_name)
 
+    def test_delete_checklist_item(self):
+        name = "Testing checklist item delete"
+        description = "Description goes here"
+        card = self._list.add_card(name, description)
+
+        name = 'Checklist'
+        checklist = self._add_checklist(card, name, ['item1', 'item2'])
+        checklist.delete_checklist_item('item2')
+
+        checklists = card.fetch_checklists()
+        self.assertEqual(len(checklists[0].items), 1)
+        self.assertEqual(checklists[0].items[0]['name'], 'item1')
+
+        card.delete()
+
 
 def suite():
     # tests = ['test01_list_boards', 'test10_board_attrs', 'test20_add_card']

trello/checklist.py

@@ -34,6 +34,22 @@ def add_checklist_item(self, name, checked=False):
         self.items.append(json_obj)
         return json_obj
 
+    def delete_checklist_item(self, name):
+        """Delete an item on this checklist
+
+        :name: name of the checklist item to delete
+        """
+        ix = self._get_item_id(name)
+        if ix is None:
+            return
+
+        obj = self.client.fetch_json(
+            '/checklists/'+ self.id +
+            '/checkItems/'+ self.items[ix]['id'],
+            http_method='DELETE')
+        del self.items[ix]
+
+
     def set_checklist_item(self, name, checked):
         """Set the state of an item on this checklist
 
@@ -103,5 +119,14 @@ def delete(self):
             '/checklists/%s' % self.id,
             http_method='DELETE')
 
+    def _get_item_id(self, name):
+        """Locate the id of the checklist item"""
+        try:
+            [ix] = [i for i in range(len(self.items)) if
+                    self.items[i]['name'] == name]
+            return ix
+        except ValueError:
+            return None
+
     def __repr__(self):
         return '<Checklist %s>' % self.id