matplotlib text alignment when using latex - matplotlib

Question

Before, this code:
import matplotlib.pyplot as plt
plt.rcParams.update({
"text.usetex": True})
plt.plot([0, 1], [0, 1])
plt.xlabel('hello\nnew world')
generated a plot with centered alignment in the x label, something like here:
But now I get this left aligned text:
I am not sure if matplotlib or latex version changed, but wondering how should I adapt my code to get back to the usual center alignment.
Thank you!
Related question:
Center title in latex-rendered text for matplotlib figure

Answer 1

Adding plt.rcParams['text.latex.preamble'] = r'\centering' solved the problem. Here is the full code:
import matplotlib.pyplot as plt
plt.rcParams.update({
"text.usetex": True})
plt.rcParams['text.latex.preamble'] = r'\centering'
plt.figure(figsize=(2,2))
plt.plot([0, 1], [0, 1])
plt.xlabel('hello \n new world')
\n can be replaced by \\\ or \\newline (as an additional \ is needed as escape character) or \linebreak (so that it doesn't start a new paragraph).
Another option is to put the centering locally:
import matplotlib.pyplot as plt
plt.rcParams.update({
"text.usetex": True})
plt.figure(figsize=(2,2))
plt.plot([0, 1], [0, 1])
plt.xlabel('\\begin{center} hello \linebreak new world \end{center}')