Introduce viewkeys(), viewvalues(), and viewitems().

Closes issue #92

1 files changed, 22 insertions, 0 deletions

diff --git a/six.py b/six.py
index 21b0e80..5efb62b 100644
--- a/six.py
+++ b/six.py
@@ -554,6 +554,15 @@ if PY3:
 
     def iterlists(d, **kw):
         return iter(d.lists(**kw))
+
+    def viewkeys(d, **kw):
+        return d.keys(**kw)
+
+    def viewvalues(d, **kw):
+        return d.values(**kw)
+
+    def viewitems(d, **kw):
+        return d.items(**kw)
 else:
     def iterkeys(d, **kw):
         return iter(d.iterkeys(**kw))
@@ -567,12 +576,25 @@ else:
     def iterlists(d, **kw):
         return iter(d.iterlists(**kw))
 
+    def viewkeys(d, **kw):
+        return d.viewkeys(**kw)
+
+    def viewvalues(d, **kw):
+        return d.viewvalues(**kw)
+
+    def viewitems(d, **kw):
+        return d.viewitems(**kw)
+
 _add_doc(iterkeys, "Return an iterator over the keys of a dictionary.")
 _add_doc(itervalues, "Return an iterator over the values of a dictionary.")
 _add_doc(iteritems,
          "Return an iterator over the (key, value) pairs of a dictionary.")
 _add_doc(iterlists,
          "Return an iterator over the (key, [values]) pairs of a dictionary.")
+_add_doc(viewkeys, "Return a view over the keys of a dictionary.")
+_add_doc(viewvalues, "Retun a view over the values of a dictionary.")
+_add_doc(viewitems,
+         "Return a view over the (key, value) pairs of a dictionary.")
 
 
 if PY3: