The proposal of adding sys.implementation has come up a couple times over the last few years. [1][2] While the reaction has been overwhelmingly positive, nothing has come of it. I've created a tracker issue and a patch: http://bugs.python.org/issue14673 The patch adds a struct sequence that holds ("name" => "CPython", "version" => sys.version_info). If later needs dictate more fields, we can cross that bridge then. Are there any objections? Considering the positive reaction and the scope of the addition, does this need a PEP? -eric [1] http://mail.python.org/pipermail/python-dev/2009-October/092893.html [2] http://mail.python.org/pipermail/python-ideas/2012-April/014878.html