updated for version 7.3.1236
Problem:    Python: WindowSetattr() missing support for NUMBER_UNSIGNED.
Solution:   Add NUMBER_UNSIGNED, add more tests. Various fixes. (ZyX)
Added tag v7-3-1236 for changeset 39980afcf54a
updated for version 7.3.1237
Problem:    Python: non-import errors not handled correctly.
Solution:   Let non-ImportError exceptions pass the finder. (ZyX)
Added tag v7-3-1237 for changeset 5b2c8f3b3906