matplotlib 3.5.1

>>> """
===============
Math fontfamily
===============

A simple example showcasing the new *math_fontfamily* parameter that can
be used to change the family of fonts for each individual text
element in a plot.

If no parameter is set, the global value
:rc:`mathtext.fontset` will be used.
"""
... 
... import matplotlib.pyplot as plt
... 
... 
... fig, ax = plt.subplots(figsize=(6, 5))
... 
... # A simple plot for the background.
... ax.plot(range(11), color="0.9")
... 
... # A text mixing normal text and math text.
... msg = (r"Normal Text. $Text\ in\ math\ mode:\ "
...  r"\int_{0}^{\infty } x^2 dx$")
... 
... # Set the text in the plot.
... ax.text(1, 7, msg, size=12, math_fontfamily='cm')
... 
... # Set another font for the next text.
... ax.text(1, 3, msg, size=12, math_fontfamily='dejavuserif')
... 
... # *math_fontfamily* can be used in most places where there is text,
... # like in the title:
... ax.set_title(r"$Title\ in\ math\ mode:\ \int_{0}^{\infty } x^2 dx$",
...  math_fontfamily='stixsans', size=14)
... 
... # Note that the normal text is not changed by *math_fontfamily*.
... plt.show()
...