For the py2.6 deprecation discussion T103063, we'd like to have some statistics about usage.
Usage of Python 2.6 on Wikimedia sites will be useful, but will not be the only relevant criteria as Python 2.6.6 is being used in corporate private environments. See T103063 for details.
How do you want to get these data for Wikimedias wikis ? By looking in server logs ? If it's your request, you should add Wikimedia-Site-requests and give a regex that can be used to parse UA of requests, if it's possible
I don't think this task is required anymore. 2.6 is mostly dead nowadays and it seems that we have an agreement to drop support for it. (T154771)