subplot-mosaic-5.py

import matplotlib.pyplot as plt

fig, axs = plt.subplot_mosaic(
    [
        ["one", "one", "two"],
        ["three", "four", "two"]
    ]
)

axs["one"].set_title("one")
axs["two"].set_title("two")
axs["three"].set_title("three")
axs["four"].set_title("four")

plt.show()