/usr/share/pyshared/txaws/version.py is in python-txaws 0.2.3-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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txaws = "0.2.3" ec2_api = "2009-11-30" s3_api = "2006-03-01"