Missed is not None in chapter 8.14 (implementing custom containers)

aliev · aliev · commit e885d712ff92 · 2016-01-18T03:28:51.000+04:00
diff --git a/src/8/implementing_custom_containers/example1.py b/src/8/implementing_custom_containers/example1.py
@@ -5,7 +5,7 @@
 
 class SortedItems(collections.Sequence):
     def __init__(self, initial=None):
-        self._items = sorted(initial) if initial is None else []
+        self._items = sorted(initial) if initial is not None else []
 
     # Required sequence methods
     def __getitem__(self, index):
diff --git a/src/8/implementing_custom_containers/example2.py b/src/8/implementing_custom_containers/example2.py
@@ -2,7 +2,7 @@
 
 class Items(collections.MutableSequence):
     def __init__(self, initial=None):
-        self._items = list(initial) if initial is None else []
+        self._items = list(initial) if initial is not None else []
 
     # Required sequence methods
     def __getitem__(self, index):
