try frozenset in _base.py too

annevk · annevk · commit 60c09e06cfe0 · 2007-01-12T22:15:49.000Z
--HG--
extra : convert_revision : svn%3Aacbfec75-9323-0410-a652-858a13e371e0/trunk%40470
diff --git a/src/treebuilders/_base.py b/src/treebuilders/_base.py
@@ -1,4 +1,10 @@
 from constants import scopingElements, tableInsertModeElements
+try:
+    frozenset
+except NameError:
+    # Import from the sets module for python 2.3
+    from sets import Set as set
+    from sets import ImmutableSet as frozenset
 
 # The scope markers are inserted when entering buttons, object elements,
 # marquees, table cells, and table captions, and are used to prevent formatting
