python Overview
Python is a clear and powerful object-oriented programming language, comparable to Perl, Ruby, Scheme, or Java. For more information see the Python Home Page
Support
Usage
An older OS provided version of python is available by default when you login on each system. However, if you wish to use a more recent python version, then you need to load a python module:module avail python module load python
Basic Example
numpy-example.py Execute a simple numpy python script on Rhea's login nodes:rhea-login2g 114> module swap PE-intel PE-gnu rhea-login2g 115> module load python/3.4.3 python_numpy rhea-login2g 116> python numpy-example.py [[ 0.52745845 -1.35692769]] * [[ 0.32870392 -0.71769511]] = [[ 0.17337766 0.97386037]]
Cray Compute Node Example
hello-mpi.py python-tst.pbs Runhello-mpi.py on 2 cores (1 core on 2 nodes):
titan-ext7 233> qsub python-tst.pbs 2886563 titan-ext7 234> cat python-tst.pbs.o2886563 Rank 1 of 2 Rank 0 of 2
Rhea Compute Node Example
Similar to the Cray example the following example will runhello-mpi.py on 4 cores (4 cores, 1 core per socket, 2 nodes):
rhea-login2g 69> qsub -I -lnodes=2 -Aabc123 -lwalltime=01:00:00 qsub: waiting for job 117261.rhea-mgmt2g.ccs.ornl.gov to start qsub: job 117261.rhea-mgmt2g.ccs.ornl.gov ready rhea19 10> source $MODULESHOME/init/csh rhea19 11> module load python python_mpi4py rhea19 12> cd $MEMBERWORK/abc123 rhea19 13> mpirun -np 4 --map-by ppr:1:socket ./hello-mpi.py Rank 0 of 4 Rank 1 of 4 Rank 3 of 4 Rank 2 of 4 rhea19 14>The example allocates compute nodes through an interactive batch job, but could easily be executed through a batch script following the Cray example above.
Builds
SUMMIT
- python@2.7.12%gcc@4.8.5
- python@2.7.12%gcc@4.8.5
- python@3.5.2%gcc@4.8.5
EOS
- python@2.7.12%gcc@5.3.0
- python@3.5.1%gcc@5.3.0
- python@2.7.12%gcc@5.3.0
- python@3.5.1%gcc@5.3.0
RHEA
- python@2.7.12%gcc@4.4.7
- python@2.7.12%gcc@5.3.0
- python@2.7.12%gcc@4.4.7
- python@2.7.12%gcc@5.3.0
TITAN
- python@2.7.12%gcc@5.3.0
- python@2.7.12%gcc@5.3.0
