Package fails to install in dapper

yves@elvis:~/svn/nwu/nwu/trunk/tests$ sudo aptitude install python-pylib
(snip)

0 packages upgraded, 0 newly installed, 0 to remove and 151 not upgraded.
Need to get 0B of archives. After unpacking 0B will be used.
Writing extended state information... Done
Setting up python2.4-pylib (0.7.20050829-0ubuntu1) ...
Compiling /usr/lib/python2.4/site-packages/py/test/testing/data/syntax_error.py ...
  File "/usr/lib/python2.4/site-packages/py/test/testing/data/syntax_error.py", line 3
    this is really not python
                            ^
SyntaxError: invalid syntax

dpkg: error processing python2.4-pylib (--configure):
 subprocess post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of python-pylib:
 python-pylib depends on python2.4-pylib; however:
  Package python2.4-pylib is not configured yet.
dpkg: error processing python-pylib (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 python2.4-pylib
 python-pylib
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install. Trying to recover:
Setting up python2.4-pylib (0.7.20050829-0ubuntu1) ...
Compiling /usr/lib/python2.4/site-packages/py/test/testing/data/syntax_error.py ...
  File "/usr/lib/python2.4/site-packages/py/test/testing/data/syntax_error.py", line 3
    this is really not python
                            ^
SyntaxError: invalid syntax

dpkg: error processing python2.4-pylib (--configure):
 subprocess post-installation script returned error exit status 1
dpkg: dependency problems prevent configuration of python-pylib:
 python-pylib depends on python2.4-pylib; however:
  Package python2.4-pylib is not configured yet.
dpkg: error processing python-pylib (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 python2.4-pylib
 python-pylib
yves@elvis:~/svn/nwu/nwu/trunk/tests$

python-codespeak-lib works and provides py.test too.