Add compatibility package to allow us to deal with Python versions 2.3

[roundup.git] / roundup / anypy / sets_.py

diff --git a/roundup/anypy/sets_.py b/roundup/anypy/sets_.py
new file mode 100644 (file)
index 0000000..e1f2f30
--- /dev/null
+++ b/roundup/anypy/sets_.py
@@ -0,0 +1,30 @@
+"""
+anypy.sets_: sets compatibility module
+
+uses the built-in type 'set' if available, and thus avoids
+deprecation warnings. Simple usage:
+
+Change all
+    from sets import Set
+to
+    from roundup.anypy.sets_ import set
+
+and use 'set' instead of 'Set'.
+To avoid unnecessary imports, you can:
+
+    try:
+        set
+    except NameError:
+        from roundup.anypy.sets_ import set
+
+see:
+http://docs.python.org/library/sets.html#comparison-to-the-built-in-set-types
+
+"""
+
+try:
+    set = set                     # built-in since Python 2.4
+except NameError, TypeError:
+    from sets import Set as set   # deprecated as of Python 2.6
+
+# vim: ts=8 sts=4 sw=4 si et