[Xen-changelog] [xen-unstable] xm: fix message in OptionError deprecated since Python 2.6

[Xen patchbot-unstable <patchbot-unstable@xxxxxxxxxxxxxxxxxxx>]

# HG changeset patch
# User Keir Fraser <keir.fraser@xxxxxxxxxx>
# Date 1259743669 0
# Node ID c3373757a5d6d9747379fa2ad575d7b8c12e25b7
# Parent  6ff4e4a66b1688f0ff5ac3b11e354c31bd69f30d
xm: fix message in OptionError deprecated since Python 2.6

BaseException.message has been deprecated since Python 2.6.  To
prevent DeprecationWarning from popping up over this pre-existing
attribute, use a new property that takes lookup precedence.

Signed-off-by: Wei Kong <weikong.cn@xxxxxxxxx>
---
 tools/python/xen/xm/opts.py |    9 +++++++++
 1 files changed, 9 insertions(+)

diff -r 6ff4e4a66b16 -r c3373757a5d6 tools/python/xen/xm/opts.py
--- a/tools/python/xen/xm/opts.py       Wed Dec 02 08:46:47 2009 +0000
+++ b/tools/python/xen/xm/opts.py       Wed Dec 02 08:47:49 2009 +0000
@@ -55,10 +55,19 @@ def wrap(text, width = 70):
     return lines
 
 class OptionError(Exception):
+    def _get_message(self):
+        return self.__message
+
+    def _set_message(self, value):
+        self.__message = value
+
+    message = property(_get_message, _set_message)
+
     """Denotes an error in option parsing."""
     def __init__(self, message, usage = ''):
         self.message = message
         self.usage = usage
+        Exception.__init__(self, message)
     def __str__(self):
         return self.message
 

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