add doctest examples of negative indices

1 files changed, 18 insertions, 1 deletions

diff --git a/urwid/monitored_list.py b/urwid/monitored_list.py
index 028e082..e7de5f9 100755
--- a/urwid/monitored_list.py
+++ b/urwid/monitored_list.py
@@ -265,8 +265,10 @@ class MonitoredFocusList(MonitoredList):
 
     def __delitem__(self, y):
         """
-        >>> ml = MonitoredFocusList([0,1,2,3], focus=2)
+        >>> ml = MonitoredFocusList([0,1,2,3,4], focus=2)
         >>> del ml[3]; ml
+        MonitoredFocusList([0, 1, 2, 4], focus=2)
+        >>> del ml[-1]; ml
         MonitoredFocusList([0, 1, 2], focus=2)
         >>> del ml[0]; ml
         MonitoredFocusList([1, 2], focus=1)
@@ -279,6 +281,13 @@ class MonitoredFocusList(MonitoredList):
         MonitoredFocusList([5, 6, 5, 6, 5], focus=2)
         >>> del ml[::2]; ml
         MonitoredFocusList([6, 6], focus=1)
+        >>> ml = MonitoredFocusList([0,1,2,3,4,6,7], focus=2)
+        >>> del ml[-2:]; ml
+        MonitoredFocusList([0, 1, 2, 3, 4], focus=2)
+        >>> del ml[-4:-2]; ml
+        MonitoredFocusList([0, 3, 4], focus=1)
+        >>> del ml[:]; ml
+        MonitoredFocusList([], focus=None)
         """
         if isinstance(y, slice):
             focus = self._adjust_focus_on_contents_modified(y)
@@ -308,6 +317,14 @@ class MonitoredFocusList(MonitoredList):
         range(1, 4, 2) <- [12, 13]
         >>> ml[::2] = [10, 11]
         range(0, 4, 2) <- [10, 11]
+        >>> ml[-3:-1] = [21, 22, 23]
+        range(1, 3, 1) <- [21, 22, 23]
+        >>> ml
+        MonitoredFocusList([10, 21, 22, 23, 13], focus=2)
+        >>> ml[:] = []
+        range(0, 5, 1) <- []
+        >>> ml
+        MonitoredFocusList([], focus=None)
         """
         if isinstance(i, slice):
             focus = self._adjust_focus_on_contents_modified(i, y)