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

Solution for pi fractions:

import numpy as np
import matplotlib.pyplot as plt

from matplotlib import rc
rc('text', usetex=True) # Use LaTeX font

import seaborn as sns
sns.set(color_codes=True)

1. Plot your function:

fig, ax = plt.subplots(1)
x = np.linspace(0, 2*np.pi, 1001)
y = np.cos(x)
ax.plot(x, y)
plt.xlim(0, 2*np.pi)

2. Modify the range of the grid so that it corresponds to the pi values:

ax.set_xticks(np.arange(0, 2*np.pi+0.01, np.pi/4))

3. Change axis labels:

labels = ['$0$', r'$\pi/4$', r'$\pi/2$', r'$3\pi/4$', r'$\pi$',
          r'$5\pi/4$', r'$3\pi/2$', r'$7\pi/4$', r'$2\pi$']
ax.set_xticklabels(labels)