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

I prefer to employ:

from matplotlib import rc
#rc('font',**{'family':'sans-serif','sans-serif':['Helvetica']})
rc('font',**{'family':'serif','serif':['Times']})
rc('text', usetex=True)