Merged revisions 78412 via svnmerge from

svn+ssh://pythondev@svn.python.org/python/trunk

........
  r78412 | r.david.murray | 2010-02-23 21:31:27 -0500 (Tue, 23 Feb 2010) | 6 lines

  Issue 7975: in python 2.6 bsddb.dbshelve switched from DictMixin to
  MutableMapping, and thereby lost functionality because the replacement
  functionality was implemented incorrectly or incompletely).  Since bsddb
  isn't in py3k, this patch just goes back to using DictMixin in order to
  correct the regression.
........

1 files changed, 6 insertions, 15 deletions

diff --git a/Lib/bsddb/dbshelve.py b/Lib/bsddb/dbshelve.py
index e291259..5990df3 100644
--- a/Lib/bsddb/dbshelve.py
+++ b/Lib/bsddb/dbshelve.py
@@ -59,16 +59,11 @@ else:
         return cPickle.dumps(object, bin=protocol)
 
 
-if sys.version_info[0:2] <= (2, 5) :
-    try:
-        from UserDict import DictMixin
-    except ImportError:
-        # DictMixin is new in Python 2.3
-        class DictMixin: pass
-    MutableMapping = DictMixin
-else :
-    import collections
-    MutableMapping = collections.MutableMapping
+try:
+    from UserDict import DictMixin
+except ImportError:
+    # DictMixin is new in Python 2.3
+    class DictMixin: pass
 
 #------------------------------------------------------------------------
 
@@ -111,7 +106,7 @@ def open(filename, flags=db.DB_CREATE, mode=0660, filetype=db.DB_HASH,
 class DBShelveError(db.DBError): pass
 
 
-class DBShelf(MutableMapping):
+class DBShelf(DictMixin):
     """A shelf to hold pickled objects, built upon a bsddb DB object.  It
     automatically pickles/unpickles data objects going to/from the DB.
     """
@@ -162,10 +157,6 @@ class DBShelf(MutableMapping):
         else:
             return self.db.keys()
 
-    if sys.version_info[0:2] >= (2, 6) :
-        def __iter__(self) :
-            return self.db.__iter__()
-
 
     def open(self, *args, **kwargs):
         self.db.open(*args, **kwargs)