SciPy has the ability to read and write data in Matlab’s .mat file format using the module. The commands are loadmat and savemat. To load data, use the following syntax:

import scipy.io
data = scipy.io.loadmat('datafile.mat')

The variable data now contains a dictionary, with keys corresponding to the variable names saved in the .mat file. The variables are in NumPy array format. Saving to .mat files involves creating a dictionary with all the variables you want to save (variable name and value). The command is then savemat:

data = {}
data['x'] = x
data['y'] = y
scipy.io.savemat('datafile.mat',data)

This saves the NumPy arrays x and y with the same names when read into Matlab.