Technically, &quot;forever&quot;, since there will be people who never port their code. If you&#x27;re depending on one of those holdouts, it&#x27;s time to find a new dependency, because if they haven&#x27;t ported by now they won&#x27;t and that&#x27;s your problem because...<p>in practical terms, the transition is about to be over, since now the Linux distros are all-in on converting to Python 3 for their current or next releases and that will forcibly move the unported libraries in the bin of obsolescence.