fortranmagic in python 3 on cocalc

import fortranmagic
fortranmagic

fortranmagic.__version__

%load_ext fortranmagic

%%fortran -v

subroutine f1(x, y, z)
    real, intent(in) :: x,y
    real, intent(out) :: z

    z = sin(x / 3 * y / 3) + cos(x * y)

end subroutine f1

import matplotlib.pyplot as plt
import numpy as np

%timeit zz = f1(3, 4)

# Some example data
x_min, x_max, y_min, y_max = -2 * np.pi, 2 * np.pi, -2 * np.pi, 2 * np.pi
f = [[f1(x, y) for x in np.linspace(x_min, x_max, num=500)]
     for y in np.linspace(y_min, y_max, num=500)]

# Make the plot
plt.figure(figsize=(10, 7))
plt.imshow(f,
           interpolation="bicubic",
           origin="lower",
           extent=[x_min, x_max, y_min, y_max])
plt.colorbar()
plt.title(r"Title here (remove for papers)")
plt.xlabel(r"Description of $x$ coordinate (units)")
plt.ylabel(r"Description of $y$ coordinate (units)")
plt.tight_layout()
plt.show()