How to efficiently do many tasks a “little later” in Python?

Question

I have a process, that needs to perform a bunch of actions \"later\" (after 10-60 seconds usually). The problem is that those \"later\" actions can be a lot (1000s), so using a

Answer 1

Presuming your process has a run loop which can receive signals and the length of time of each action is within bounds of sequential operation, use signals and posix alarm()

    signal.alarm(time)
If time is non-zero, this function requests that a 
SIGALRM signal be sent to the process in time seconds. 

This depends on what you mean by "those "later" actions can be a lot" and if your process already uses signals. Due to phrasing of the question it's unclear why an external python package would be needed.