Issuing at the command line:: $ mpiexec -n 5 python helloworld.py will launch a five-process run of the Python interpreter and execute the test script ``helloworld.py``, a parallelized version of the *Hello World!* program.
Issuing at the command line:: $ mpiexec -n 5 python helloworld.py will launch a five-process run of the Python interpreter and execute the test script ``helloworld.py``, a parallelized version of the *Hello World!* program.
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