PyLauncher (Python + Launcher) is a Python-based parametric job launcher, a utility for distributing and executing many small jobs in parallel, using fewer resources than would be necessary to execute all jobs simultaneously. On many batch-based cluster computers this is a better strategy than submitting many small individual small jobs.

While TACC's deprecated Launcher utility worked on serial codes, PyLauncher works with multi-threaded and MPI executables.

Example: You need to run a program with 1000 different input values, and you want to use 100 cores for that; PyLauncher will cycle through your list of commands using cores as they become available.

The PyLauncher source code is written in Python, but this need not concern you: in the simplest scenario you use a two line Python script. However, for more sophisticated scenarios the code can be extended or integrated into a Python application.

#!/bin/bash
#
# Simple SLURM script for submitting multiple serial
# commands (e.g. parametric studies) using a script wrapper
# to launch the commands.
#
# To use, change this job script to accommodate
# running your serial application(s) in your WORKDIR
# directory (usually the directory of submission).
# Edit the commands file to specify the executions
# for the launcher (paramrun) to perform.
#-------------------------------------------------------
#-------------------------------------------------------
#
#         <------ Setup Parameters ------>
#
#SBATCH -J launcher_test
#SBATCH -N 1
#SBATCH -n 16             #use site recommended # of cores
#SBATCH -p shortq7
#SBATCH -o launcher_test.o%j
#SBATCH -e launcher_test.e%j
#SBATCH -t 00:59:00
##SBATCH -A <acct_name>   #uncomment and insert acct name if necessary
#------------------------------------------------------

#                         # USING SLURM; plugins defines SLURM env. vars.
export LAUNCHER_RMI=SLURM
export LAUNCHER_PLUGIN_DIR=$LAUNCHER_DIR/plugins

#                         # JOB_FILE is a list of executions to run

export LAUNCHER_JOB_FILE=`pwd`/commands
export LAUNCHER_SCHED=interleaved
export LAUNCHER_WORKDIR=`pwd`

$LAUNCHER_DIR/paramrun    # will run the executions in the LAUNCHER_JOB_FILE file
                          # "JOB" is a misnomer--these are not slurm jobs
                          # Each line in the commands file is an execution.

Reference: 
https://docs.tacc.utexas.edu/software/pylauncher/