fohlin · October 11, 2010 20:59 · Mar 30, 2011 · Oct 11, 2010 · Oct 11, 2010
diff --git a/speaking_list.py b/speaking_list.py
@@ -7,7 +7,7 @@ def say(s):
     subprocess.call(['say', str(s)])
 
 class SpeakingList(list):
-    """This custom lists speaks (if you're on OS X). Amazing!"""
+    """This custom list speaks (if you're on OS X). Amazing!"""
     def __init__(self):
         super(SpeakingList, self).__init__()
         say("A new list is born!")

diff --git a/speaking_list.py b/speaking_list.py
@@ -9,7 +9,7 @@ def say(s):
 class SpeakingList(list):
     """This custom lists speaks (if you're on OS X). Amazing!"""
     def __init__(self):
-        super(SpeakingList, self).__init__(self)
+        super(SpeakingList, self).__init__()
         say("A new list is born!")
 
     def append(self, value):

diff --git a/speaking_list.py b/speaking_list.py
@@ -0,0 +1,22 @@
+# Using the OS X "say" command to demo inheritance
+# Thanks to Simon Willison for inspiration: http://gist.github.com/267147
+
+import subprocess
+
+def say(s):
+    subprocess.call(['say', str(s)])
+
+class SpeakingList(list):
+    """This custom lists speaks (if you're on OS X). Amazing!"""
+    def __init__(self):
+        super(SpeakingList, self).__init__(self)
+        say("A new list is born!")
+
+    def append(self, value):
+        super(SpeakingList, self).append(value)
+        say("Added: %s" % value)
+
+    def __len__(self):
+        l = super(SpeakingList, self).__len__()
+        say("The list length is %s" % l)
+        return l