If wanting to know up front if this is designed for the future or the past is an edge case, it&#x27;s a pretty crowded edge. Python 3 was released eight years ago, and I will ALWAYS choose a competing technology (if it means a language other than Python, that&#x27;s fine with me) before I&#x27;ll let Python 2 play any role in a new project I architect.<p>The first thing I looked for on the Bokeh website was some sort of clear statement on the front page about it being Python 3. I don&#x27;t have an immediate need for it, but if it&#x27;s Python 3, I&#x27;ll keep it in mind. If it&#x27;s just that euphemistic &quot;Python&quot;, it may as well be Cobol for all I&#x27;d care.<p>I thought I&#x27;d skim over these comments just in case someone asked the obvious question, and someone did. (Thank you.) And, yes, it is apparently Python 3 enough that we wouldn&#x27;t need to use any Python 2 if we adopted it.<p>Very nice. Now I wish I DID need it, but maybe I&#x27;ll do a side project of my own with it, just for fun. I&#x27;ll be keeping it in mind in any case. I&#x27;ll bet &quot;Python 3&quot; is mentioned somewhere on the site, but I didn&#x27;t spot it right away. It might be worth making it a bit more prominent, since it is an important feature for those designing for the future.