Index: pyyaml/trunk/announcement.msg
===================================================================
--- pyyaml/trunk/announcement.msg	(revision 378)
+++ pyyaml/trunk/announcement.msg	(revision 380)
@@ -20,4 +20,6 @@
   (Thank to kristjan(at)ccpgames(dot)com).
 * LibYAML bindings are rebuilt with the latest version of Cython.
+* Dropped support for Python 2.3 and 2.4; currently supported versions
+  are 2.5 to 3.2.
 
 
Index: pyyaml/trunk/lib/yaml/representer.py
===================================================================
--- pyyaml/trunk/lib/yaml/representer.py	(revision 328)
+++ pyyaml/trunk/lib/yaml/representer.py	(revision 380)
@@ -7,9 +7,4 @@
 
 import datetime
-
-try:
-    set
-except NameError:
-    from sets import Set as set
 
 import sys, copy_reg, types
Index: pyyaml/trunk/lib/yaml/reader.py
===================================================================
--- pyyaml/trunk/lib/yaml/reader.py	(revision 323)
+++ pyyaml/trunk/lib/yaml/reader.py	(revision 380)
@@ -21,39 +21,4 @@
 
 import codecs, re
-
-# Unfortunately, codec functions in Python 2.3 does not support the `finish`
-# arguments, so we have to write our own wrappers.
-
-try:
-    codecs.utf_8_decode('', 'strict', False)
-    from codecs import utf_8_decode, utf_16_le_decode, utf_16_be_decode
-
-except TypeError:
-
-    def utf_16_le_decode(data, errors, finish=False):
-        if not finish and len(data) % 2 == 1:
-            data = data[:-1]
-        return codecs.utf_16_le_decode(data, errors)
-
-    def utf_16_be_decode(data, errors, finish=False):
-        if not finish and len(data) % 2 == 1:
-            data = data[:-1]
-        return codecs.utf_16_be_decode(data, errors)
-
-    def utf_8_decode(data, errors, finish=False):
-        if not finish:
-            # We are trying to remove a possible incomplete multibyte character
-            # from the suffix of the data.
-            # The first byte of a multi-byte sequence is in the range 0xc0 to 0xfd.
-            # All further bytes are in the range 0x80 to 0xbf.
-            # UTF-8 encoded UCS characters may be up to six bytes long.
-            count = 0
-            while count < 5 and count < len(data)   \
-                    and '\x80' <= data[-count-1] <= '\xBF':
-                count -= 1
-            if count < 5 and count < len(data)  \
-                    and '\xC0' <= data[-count-1] <= '\xFD':
-                data = data[:-count-1]
-        return codecs.utf_8_decode(data, errors)
 
 class ReaderError(YAMLError):
@@ -160,11 +125,11 @@
         if not isinstance(self.raw_buffer, unicode):
             if self.raw_buffer.startswith(codecs.BOM_UTF16_LE):
-                self.raw_decode = utf_16_le_decode
+                self.raw_decode = codecs.utf_16_le_decode
                 self.encoding = 'utf-16-le'
             elif self.raw_buffer.startswith(codecs.BOM_UTF16_BE):
-                self.raw_decode = utf_16_be_decode
+                self.raw_decode = codecs.utf_16_be_decode
                 self.encoding = 'utf-16-be'
             else:
-                self.raw_decode = utf_8_decode
+                self.raw_decode = codecs.utf_8_decode
                 self.encoding = 'utf-8'
         self.update(1)
Index: pyyaml/trunk/lib/yaml/constructor.py
===================================================================
--- pyyaml/trunk/lib/yaml/constructor.py	(revision 377)
+++ pyyaml/trunk/lib/yaml/constructor.py	(revision 380)
@@ -7,9 +7,4 @@
 
 import datetime
-
-try:
-    set
-except NameError:
-    from sets import Set as set
 
 import binascii, re, sys, types
@@ -503,9 +498,5 @@
                     "expected non-empty name appended to the tag", mark)
         if u'.' in name:
-            # Python 2.4 only
-            #module_name, object_name = name.rsplit('.', 1)
-            items = name.split('.')
-            object_name = items.pop()
-            module_name = '.'.join(items)
+            module_name, object_name = name.rsplit('.', 1)
         else:
             module_name = '__builtin__'
Index: pyyaml/trunk/CHANGES
===================================================================
--- pyyaml/trunk/CHANGES	(revision 378)
+++ pyyaml/trunk/CHANGES	(revision 380)
@@ -9,4 +9,5 @@
 * Clear cyclic references in the parser and the emitter
   (Thank to kristjan(at)ccpgames(dot)com).
+* Dropped support for Python 2.3 and 2.4.
 
 3.09 (2009-08-31)