import matplotlib.pyplot as plt

months = ["Jan", "Feb", "Mar", "Apr"]
north = [18, 22, 24, 28]
south = [14, 18, 20, 23]
target = [16, 20, 23, 26]

fig, ax = plt.subplots(layout="constrained")
ax.plot(months, north, marker="o", label="North region")
ax.plot(months, south, marker="s", label="South region")
ax.plot(months, target, linestyle="--", color="0.35", label="Target")

legend = ax.legend(loc="upper left", title="Sales plan", ncols=1, frameon=True)
ax.set_title("Quarterly bookings")
ax.set_ylabel("Bookings")

fig.savefig("legend-add-output.png", dpi=160)

labels = ", ".join(text.get_text() for text in legend.get_texts())
print(f"Legend labels: {labels}")
print("Saved figure: legend-add-output.png")