How to call Alexa intent from external python code and alexa device to announce
It's not possible to do that with Alexa. Alexa can be activated only using the voice and it's by design.
Here is my requirement.

External program will get some signals from subprograms each min or specific intervals.
I want that external program to call Alexa and pass this information
who connect with this skill set should hear automatically this output rather than asking Alexa what is the status