Support None values in tuple/list/set types.

CHANGES.txt

@@ -5,7 +5,7 @@ CHANGES
 1.3.2 (unreleased)
 ------------------
 
-- Nothing changed yet.
+- Support `None` values in tuple/list/set types.
 
 
 1.3.1 (2012-11-23)

src/cipher/configstore/configstore.py

@@ -130,7 +130,14 @@ def load_type_Choice(self, unicode, field):
     def load_type_List(self, unicode, field):
         if not unicode.strip():
             return []
-        return [item.strip() for item in unicode.split(self.listValueSeparator)]
+        items = []
+        for item in unicode.split(self.listValueSeparator):
+            stripped = item.strip()
+            if stripped == NONE_VALUE_MARKER:
+                items.append(None)
+            else:
+                items.append(stripped)
+        return items
 
     def load_type_Tuple(self, unicode, field):
         return tuple(self.load_type_List(unicode, field))
@@ -224,7 +231,9 @@ def dump_type_Choice(self, value, field):
             return ''
 
     def dump_type_Tuple(self, value, field):
-        return self.listValueSeparator.join(value)
+        items = [NONE_VALUE_MARKER if i is None else i
+                 for i in value]
+        return self.listValueSeparator.join(items)
 
     dump_type_List = dump_type_Tuple
     dump_type_Set = dump_type_Tuple

src/cipher/configstore/configstore.txt

@@ -426,6 +426,12 @@ List
   >>> store.load_type_List('one, two, three', field)
   ['one', 'two', 'three']
 
+  >>> store.dump_type_List(['one', None, 'three'], field)
+  u'one, <<<###NONE###>>>, three'
+
+  >>> store.load_type_List('one, <<<###NONE###>>>, three', field)
+  ['one', None, 'three']
+
   >>> store.load_type_List('', field)
   []
 
@@ -440,6 +446,12 @@ Tuple
   >>> store.load_type_Tuple('one, two, three', field)
   ('one', 'two', 'three')
 
+  >>> store.dump_type_Tuple(('one', None, 'three'), field)
+  u'one, <<<###NONE###>>>, three'
+
+  >>> store.load_type_Tuple('one, <<<###NONE###>>>, three', field)
+  ('one', None, 'three')
+
   >>> store.load_type_Tuple('', field)
   ()
 
@@ -454,5 +466,11 @@ Set
   >>> store.load_type_Set('one, two, three', field)
   set(['three', 'two', 'one'])
 
+  >>> store.dump_type_Set(set(['one', None, 'three']), field)
+  u'<<<###NONE###>>>, three, one'
+
+  >>> store.load_type_Set('one, <<<###NONE###>>>, three', field)
+  set([None, 'three', 'one'])
+
   >>> store.load_type_Set('', field)
   set([])