durand@electrostatic:~$ python -C "import bzrlib"
Unknown option: -C
usage: python [option] ... [-c cmd | -m mod | file | -] [arg] ...
Try `python -h' for more information.
durand@electrostatic:~$ python -c "import bzrlib"
warning: Python C API version mismatch for module cStringIO: This Python has API version 1013, module cStringIO has version 1012.
warning: Python C API version mismatch for module time: This Python has API version 1013, module time has version 1012.
warning: Python C API version mismatch for module select: This Python has API version 1013, module select has version 1012.
warning: Python C API version mismatch for module fcntl: This Python has API version 1013, module fcntl has version 1012.
warning: Python C API version mismatch for module struct: This Python has API version 1013, module struct has version 1012.
Error in sys.excepthook:
Traceback (most recent call last):
  File "/var/lib/python-support/python2.4/apport_python_hook.py", line 30, in apport_excepthook
    import apport.report, apport.fileutils
  File "/var/lib/python-support/python2.4/apport/__init__.py", line 1, in <module>
    from apport.report import Report
  File "/var/lib/python-support/python2.4/apport/report.py", line 14, in <module>
    import subprocess, tempfile, os.path, urllib, re, pwd, grp, os, sys
  File "/usr/lib/python2.4/subprocess.py", line 379, in <module>
    import pickle
  File "/usr/lib/python2.4/pickle.py", line 36, in <module>
    import warnings
  File "/usr/lib/python2.4/warnings.py", line 258, in <module>
    simplefilter("ignore", category=OverflowWarning, append=1)
NameError: name 'OverflowWarning' is not defined

Original exception was:
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/usr/share/pycentral/bzr/site-packages/bzrlib/__init__.py", line 19, in <module>
    from bzrlib.osutils import get_user_encoding
  File "/usr/share/pycentral/bzr/site-packages/bzrlib/osutils.py", line 57, in <module>
    from bzrlib import symbol_versioning
  File "/usr/share/pycentral/bzr/site-packages/bzrlib/symbol_versioning.py", line 39, in <module>
    from warnings import warn
  File "/usr/lib/python2.4/warnings.py", line 258, in <module>
    simplefilter("ignore", category=OverflowWarning, append=1)
NameError: name 'OverflowWarning' is not defined