Executing a Python script multiple times with different option flags

Question

I have a Python script using the parser package for setting option flags (like -d dataset and -s size etc. and finally the results are written to a file. How can i run the command many times (sequentially) with different option flags for each run?

I need something like this:

datasets = [a,b,c]
sizes = [100,200,300]

for dataset in dataset:                           #specify parameters
    for size in sizes:                            #specify more parameters
         python script.py -d dataset -s size      #run script

What would be the best (or even 'a') way to do this?

randomir · Accepted Answer · 2017-10-31 11:29:36Z

6

A direct translation of your pseudo/python-code to bash, with arrays instead of lists and classic for loops:

#!/bin/bash

datasets=('a' 'b' 'c')
sizes=(100 200 300)

for dataset in "${datasets[@]}"; do
    for size in "${sizes[@]}"; do
        python script.py -d "$dataset" -s "$size"
    done
done

If sizes are more like a range, and not a list of hand-picked values, you can use the brace expansion:

for size in {100..300..100}; do
    # ...
done

or the arithmetic for loop:

for ((size=100; size<=300; size+=100)); do
    # ...
done

edited Oct 31, 2017 at 11:29

answered Oct 31, 2017 at 11:23

randomir

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