CurveGraph.py

from mpl_toolkits.mplot3d import Axes3D  # noqa: F401 unused import

import numpy as np
import matplotlib.pyplot as plt


plt.rcParams['legend.fontsize'] = 10

fig = plt.figure()
ax = fig.gca(projection='3d')

# Prepare arrays x, y, z
theta = np.linspace(-1 * np.pi, np.pi, 100)
x = np.cos(theta) * np.sin(2*theta)
y = np.sin(theta) * np.sin(2 * theta)
z = np.cos(2 * theta)

ax.plot(x, y, z, label='parametric curve')
ax.legend()
plt.show()