How to start a command at a given time insidea python code?

Question

For examle every half an hour...

Answer 1

Use time module

Answer 2

So make your code to calculate the time taken for every run (your process time) and subtract the time(time.sleep(your subtracted time) to make it exactly half an hour

Answer 3

Yes, i used it already.

Here's my code.(temp read software for rpi):

www.fierostudio.hu/10.pdf

Now it waits 1800 sec (time.sleep(1800)) after
every loop. Because process takes some secs every time, so there will be a little more time between the instructions are done.

So i would like to start the instructions inside the loop in every exact half an hour. Is there a simple function for that inside the time module?

I hope i was clear.
Thanks!

Answer 4

Wow! Thanks! That was the idea i needed!

Answer 5

Because of the troubleshooting process, one run's duration can't be predictible. But at the end of one run, i can get the exact time, and from it i can calculate the upcoming sleep time. So thanks for the idea.

Before, i was thinking of how to start a run at a given time... So the code allways would had to watch the time somehow...