Use Python to dump a variable in a mat file into a numpy format delimited text file

matimport.py

# requires scipy and numpy:
# e.g., with:
# pip install scipy numpy
import sys
import scipy.io as sio
from numpy import savetxt

filein = sys.argv[1]
fileout = sys.argv[2]
arr_dict = sio.loadmat(filein)

try:
    var = sys.argv[3]
    arr = arr_dict[var]
    savetxt(fileout, arr)
except:
    print(arr_dict.keys())