You need to install this module first by executing the following in a terminal window:
conda install mpi4py
The module is imported by adding the following line to your Python script:
import mpi4py as mpi
The execution of a parallelized code is done from a terminal with the command mpiexec. Assuming that your code is stored in the file script.py, executing this code on a computer with a four-core CPU is done in the terminal window by running the following command:
mpiexec -n 4 python script.py
Alternatively, to execute the same script on a cluster with two computers, run the following in a terminal window:
mpiexec --hostfile=hosts.txt python script.py
You have to provide a file hosts.txt containing the names or IP addresses of the computers with the number of their cores you want to bind to a cluster:
# Content of hosts.txt
192.168.1.25 :4 # master computer with 4 cores
192.168.1.101:2 # worker computer with 2 cores
The Python script, here script.py, has to be copied...
