How to Find Out the Number of CPUs in Python

Using multiprocessing Module

The multiprocessing.cpu_count() method returns the number of CPUs in the system. For example,

#!/usr/bin/python3

# Import module
import multiprocessing

cpus = multiprocessing.cpu_count()
print(cpus)

4

When the number of CPUs cannot be determined a NotImplementedError is raised.

Using os Module

The os.cpu_count() method returns the number of CPUs in the system. Returns None if undetermined.

The following example should cover whatever you are trying to do:

#!/usr/bin/python3

# Import module
import os

cpus = os.cpu_count()
print(cpus)

4