How to change fonts in matplotlib (python)?

Question

It sounds as an easy problem but I do not find any effective solution to change the font (not the font size) in a plot made with matplotlib in python.

I found a coup

Answer 1

import pylab as plb
plb.rcParams['font.size'] = 12

or

import matplotlib.pyplot as mpl
mpl.rcParams['font.size'] = 12