when using python eikon API, I am doing :
import eikon as ek
ek.set_app_key('key generated in eikon with APP KEY Generator')
But the Python console is not returning anything, and the program is lost somewhere..
The set app key function call is when the Eikon library initiates the connection to Eikon proxy. It is possible that the proxy is shutdown or listening on a different port. A simple fix would be to try to reboot your machine and see if everything is in order.
In case you are still having issues, please see this troubleshooting article, and attach the Eikon logs here.