How to set axis ticks in multiples of pi (Python) (matplotlib)

Question

I\'d like to make a plot in Python and have x range display ticks in multiples of pi.

Is there a good way to do this, not manually?

I\'m thinking of using

Answer 1

I created a PyPi Package that creates formatter and locator instances like Scott Centoni's answer.

"""Show a simple example of using MultiplePi."""

import matplotlib.pyplot as plt
import numpy as np

from matplot_fmt_pi import MultiplePi

fig = plt.figure(figsize=(4*np.pi, 2.4))
axes = fig.add_subplot(111)
x = np.linspace(-2*np.pi, 2*np.pi, 512)
axes.plot(x, np.sin(x))

axes.grid(True)
axes.axhline(0, color='black', lw=2)
axes.axvline(0, color='black', lw=2)
axes.set_title("MultiplePi formatting")

pi_manager = MultiplePi(2)
axes.xaxis.set_major_locator(pi_manager.locator())
axes.xaxis.set_major_formatter(pi_manager.formatter())

plt.tight_layout()
plt.savefig("./pi_graph.png", dpi=120)