Event_type paramter question

Python Programming
1

hello guys
I am fairly new to python programming and I am working through the tutorials and reading up online in other python resource sites. I got through the Control Servos tutorial and my code is working fine.
I went line by line trying to learn what it all meant and did however there is one line I am not understanding fully
image

I’m talking about the following line
If event_type == VC_CONTROLLER_END:

the reason I am confused is because I don’t see event_type being declared or used anywhere else in the program.

so I don’t understand where it’s getting it’s value from in order to compare it to the VC_CONTROLLER_END constant.

My other question related to this program is that VC_CONTROLLER_END constant what kind of value does it hold. string, numeric, object.

sorry if my questions seems a bit dumb like I said I am pretty new to python.

thanks in advance to anyone that can shed some light in the matter

Carlos

2

I have a similar question:

what VC_CONTROLLER_END means ?

it only say “Event type for a controller.” in the Python_API.chm file

thanks

3

Some events are synchronous, which means that when they occur, they occur exactly on a heartbeat.
Asynchronous events may occur outside heartbeats.

Event Decription Synchronous
VC_CONTROLLER_START Motion started. Asynchronous.
VC_CONTROLLER_RUNNING Motion is running. Synchronous.
VC_CONTROLLER_END Motion ended successfully. Synchronous.
VC_CONTROLLER_STOP Motion forcibly stopped. Asynchronous.
VC_CONTROLLER_UNREACHABLE Motion stopped because target is unreachable. Synchronous.
VC_CONTROLLER_COLLISIONS Motion stopped because a collision occurred. Synchronous.