The latest python-pyblock package (python-pyblock-0.49-1.fc14) is built against python 2.6 and needs to be rebuilt against python 2.7. An earlier build (python-pyblock-0.47-2.fc14) was successfully built against python 2.7 so the build should be straight-forward.
python-pyblock-0.49-2.fc14 has been submitted as an update for Fedora 14. http://admin.fedoraproject.org/updates/python-pyblock-0.49-2.fc14
python-pyblock-0.49-2.fc14 has been pushed to the Fedora 14 testing repository. If problems still persist, please make note of it in this bug report. If you want to test the update, you can install it with su -c 'yum --enablerepo=updates-testing update python-pyblock'. You can provide feedback for this update here: http://admin.fedoraproject.org/updates/python-pyblock-0.49-2.fc14
python-pyblock-0.49-2.fc14 has been pushed to the Fedora 14 stable repository. If problems still persist, please make note of it in this bug report.