I play around with alpine Linux 3.10.x and Kamailio 5.2.x and I search for app_python3 and KEMI support. But I don't found it. 

AFAIK if I want to use KEMI with Python3 I need of course Kamailio and app_python3 (maybe something else?). 

Is the package maintainer on this list? 

Cheers 

Karsten