How to spawn a process
The term "spawn" means the creation of a process by a parent process. The parent process can of course continue its execution asynchronously or wait until the child process ends its execution. The multiprocessing library of Python allows the spawning of a process through the following steps:
- Build the object process.
- Call its
start()method. This method starts the process's activity. - Call its
join()method. It waits until the process has completed its work and exited.
How to do it...
This example shows you how to create a series (five) of processes. Each process is associated with the function foo(i), where i is the ID associated with the process that contains it:
#Spawn a Process: Chapter 3: Process Based Parallelism
import multiprocessing
def foo(i):
print ('called function in process: %s' %i)
return
if __name__ == '__main__':
Process_jobs = []
for i in range(5):
p = multiprocessing.Process(target=foo, args=...
The rest of the chapter is locked
83
Tech Concepts
36
Programming languages
73
Tech Tools
Unlimited access to the largest independent learning library in tech of over 8,000 expert-authored tech books and videos.
Innovative learning tools, including AI book assistants, code context explainers, and text-to-speech.
50+ new titles added per month and exclusive early access to books as they are being written.
Register for a free Packt account to unlock a world of extra content!
A free Packt account unlocks extra newsletters, articles, discounted offers, and much more. Start advancing your knowledge today.
Unlock this book and the full library FREE for 7 days
Get unlimited access to 7000+ expert-authored eBooks and videos courses covering every tech area you can think of
Renews at $19.99/month. Cancel anytime
Authors (1)
Personalised recommendations for you
Based on your interests and search pattern
