Passing python array to bash script (and passing bash variable to python function)

Question

I have written a Python module which contains functions that return arrays. I want to be able to access the string arrays returned from the python module, and iterate over i

Answer 1

As well as Maria's method to obtain output from python, you can use the argparse library to input variables to python scripts from bash; there are tutorials and further docs here for python 3 and here for python 2.

An example python script command_line.py:

import argparse
import numpy as np

if __name__ == "__main__":

    parser = argparse.ArgumentParser()

    parser.add_argument('x', type=int)

    parser.add_argument('array')

    args = parser.parse_args()

    print(type(args.x))
    print(type(args.array))
    print(2 * args.x)

    str_array = args.array.split(',')
    print(args.x * np.array(str_array, dtype=int))

Then, from a terminal:

$ python3 command_line.py 2 0,1,2,3,4

# Output


4
[0 2 4 6 8]