Hi Gregg,
We do not know of any reason why you would not be able to use Python 3 with SecureCRT 9.0 beta 1 at this time. I recommend taking a look at the following forum post for additional information about running Python 3 with SecureCRT:
https://forums.vandyke.com/showthread.php?t=14295
If you do encounter any issues, please let us know by sending an email to
support@vandyke.com so that we can take a look!