quad_bezier.py

import matplotlib.path as mpath
import matplotlib.patches as mpatches
import matplotlib.pyplot as plt

Path = mpath.Path

fig, ax = plt.subplots()
pp1 = mpatches.PathPatch(
    Path([(0, 0), (1, 0), (1, 1)],
         [Path.MOVETO, Path.CURVE3, Path.CURVE3]),
    fc="C2", transform=ax.transData,alpha=0.5)
ax.add_patch(pp1)
ax.plot([0,1], [0,1], "ro")
ax.set_title('Quadratic Bézier curve')
plt.savefig("quadbc.png",dpi=120)
plt.show()

fig, ax = plt.subplots()
pp1 = mpatches.PathPatch(
    Path([(0, 0), (1, 0), (1, 1), (0, 1)],
         [Path.MOVETO, Path.CURVE4, Path.CURVE4, Path.CURVE4]),
    fc="C6", transform=ax.transData,alpha=0.5)

ax.add_patch(pp1)
ax.plot([0,0], [0,1], "ro")
ax.set_title('Cubic Bézier curve')
plt.savefig("cubicbc.png",dpi=120)
plt.show()

import matplotlib
print(matplotlib.__version__)
3.2.2