Jul-03-2020, 08:27 PM
(This post was last modified: Jul-03-2020, 08:27 PM by escape_freedom13.)
(Jul-03-2020, 09:49 AM)HarleyQuin Wrote: Sure, its also important to take into account the time it will take your function to complete.
What sort of function are you using? Does it take long to execute? The more code you add then naturally your while loop will slow down without any sleep function.
Its tough to give you advise on code because i don't know what you are trying to accomplish overall!
Wish i could offer more help,
Harley
Thank you for the response.
The whole pipe is like this, there are two processes which collects data. One from serial port another from another local machine via TCP. Third process stores in db and compares data of other two processes. So, process 1 and stores collected data in two variable and the third one do have two shadow variable of process 1 and 2 which is getting continually updated via TCP. So, the TCP client should continually watch for changes on the variable for any change.
The time taken by do_something function is not of any concern, because even it do take a long time, noting changes, as it'll run only once when variable changes, whole the other time (it may be minutes or hours, until the changableVariable changes) the while loop runs free. Inside of the do_something function collects the variable changes to a custom application layer protocol data and sends via TCP. As it nothing to do with my question so, I avoided those ~150 lines of code which will only jumble up the post, and readers have to spend a lot of time to read, understand and figure out that, in the code where my question lies. So, to keep it brief and to the point I've written this stripped down code to as pin pointed to the question as I can.
So, finally once again my concern is to keep an watch on a variable, whenever it changes something happens. How to do that efficiently? As per my code above how to keep an watch on the 'changableVariable', whenever it changes do_something function runs? If you suggest any other workaround except using while True loop, you're welcome.
Hope you understand and..... Thanks again.
(Jul-03-2020, 10:11 AM)buran Wrote: maybe you can elaborate on what you are actually doing. there might be better approach to achieve it. at the moment this looks very much like XY problem
Thank you for the response.
I've explained the pipeline in previous reply. Please refer to that.
Your explanation on importing module saved my day man!
Thanks again.