[Python] Inputting variables when running python code in MATLAB using system

I have this part of my MATLAB script where im trying to run a python code:

%%% MATLAB %%%
system(sprintf('python "%s" "%s" "%s"', 'Merge_CT_MRI_targets.py', num2str(OriginalPatients(index_target)), num2str(target_list(index_target))));
disp('test1')


This is the python script:

### PYTHON ###
import itk
import numpy as np
import os
import time

MRI_target = itk.imread("MRI_"+target+"_"+originalPatient+".nii", itk.F)


However, it looks like the variables aren't being properly called in the python script:

% matlab command window %
Traceback (most recent call last):
File "Merge_CT_MRI_targets.py", line 23, in <module>
MRI_target = itk.imread("MRI_"+target+"_"+originalPatient+".nii", itk.F)
^^^^^^
NameError: name 'target' is not defined


Any help is appreciated. I previously tried using pyrunfile but it also brings an error.

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