svn current won't run on mac

I had about a three week old tree which worked fine under mac with the
default python install,
wxWidgets-2.8.4.2 unicode for the mac (the current binary install),
APSW 3.3.13-r1, and pySerial 2.2..

This morning I did a svn update and bitpim fails to run:


kika:~/src/bitpim/src$ python
Python 2.3.5 (#1, Dec  7 2006, 14:50:51)
[GCC 4.0.1 (Apple Computer, Inc. build 5363) (+4864187)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> ^D
kika:~/src/bitpim/src$ svn update
At revision 4371.
kika:~/src/bitpim/src$ pythonw ./bp.py
  File "./bp.py", line 70
    with guihelper.WXDialogWrapper(wx.MessageDialog(None, _msg, 'BitPim Error',
                 ^
SyntaxError: invalid syntax
kika:~/src/bitpim/src$ python guihelper.py
  File "guihelper.py", line 172
    @contextlib.contextmanager
    ^
SyntaxError: invalid syntax


What's this contextlib stuff?  Is it new?  Any other ideas as to what
the problem could be?

Thanks,
Jon

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