python3 py_print.py > test.csv

cat << EOT > gpl.txt
set terminal png
set output 'fig_test.png'
set datafile separator ","
set xrange[0:1]
set yrange[0:1]
set xtics 0.1
set ytics 0.1
set format x '%2.1f'
set format y '%2.1f'
set grid
set xlabel 'Fixity Factor'
set ylabel 'Normalized Critical Load'
set key left top
plot 'test.csv' using 1:6 title 'a' with lines lw 2, \
     'test.csv' using 1:7 title 'b' with lines lw 2, \
     'test.csv' using 1:8 title 'c' with lines lw 2, \
     'test.csv' using 1:9 title 'd' with lines lw 2
EOT
gnuplot gpl.txt