s2i2a 0.0.9

Sweep to int to arguments. Map parameter sweeps to ints to program arguments. Specifically useful for compute canada.

litreview

Maps a parameter sweep to an int and then back again.

Install

pip3 install s2i2a

Usage

s2i2a <direction> <command> <sweep arguments>

The goal is to support all the sweep syntax used by hydra's default sweeper.

But for now, s2i2a just supports sweeps of the shape arg=val1,val2,val3,....

A help message is also provided

s2i2a --help

Sample usage

Call s2i2a s2i with all the shell arguments necessary to run your script, plus your script's arguments, plus your sweeps.

s2i2a s2i python3 train.py \
'non-sweep argument' another_non-sweep_arg \
arg1=val1,val2 arg2=val3,val4,val5

This generates a s2i.txt file in your local directory containing

arg1=val1 arg2=val3
arg1=val1 arg2=val4
arg1=val1 arg2=val5
arg1=val2 arg2=val3
arg1=val2 arg2=val4
arg1=val2 arg2=val5
python3 train.py 'non-sweep argument' another_non-sweep_arg

You then build a Docker/Singularity image containing said file, and you install s2i2a inside that image.

Then you can call at the end of a .sh file (say, an SBATCH script containing $SLURM_ARRAY_TASK_ID):

s2i2a i2a 3

This calls execvp, and replaces s2i2a's process by

python3 train.py 'non-sweep argument' another_non-sweep_arg arg1=val2 arg2=val3

Quick debugging

You probably don't want to mess up your sweeps after uploading to the cluster. Instead, you can invoke test_s2i2a.py. This will run a dummy execvp invokation and will print what arguments got passed to the script. Be aware that it will rewrite the path of the script to point to s2i2a's installation folder.