nested pie charts

t.py

import matplotlib.pyplot as plt
from matplotlib.cm import get_cmap
import numpy as np

fig, ax = plt.subplots()

timings = np.array([11, 360, 573, 758])
total_timings = np.vstack([timings, 1000 - timings])
inner = total_timings[:, 0]
mid = total_timings[:, 1]
mid1 = total_timings[:, 2]
outer = total_timings[:, 3]

labels_inner = ["polars (11 sec)", ""]
labels_mid = ["pandas (360 sec)", ""]
labels_mid1 = ["dask (573 sec)", ""]
labels_outer = ["modin (758 sec)", ""]

ax.pie(
    inner,
    radius=0.4,
    wedgeprops=dict(width=0.2, edgecolor="w"),
    labels=labels_inner,
    counterclock=False,
    startangle=90,
    colors=[(1, 0, 0, 1), (0, 0, 0, 0)],
    labeldistance=None,
)
ax.pie(
    mid,
    radius=0.6,
    wedgeprops=dict(width=0.2, edgecolor="w"),
    labels=labels_mid,
    counterclock=False,
    startangle=90,
    colors=[(0.3, 0.6, 0, 1), (0, 0, 0, 0)],
    labeldistance=None,
)
ax.pie(
    mid1,
    radius=0.8,
    wedgeprops=dict(width=0.2, edgecolor="w"),
    labels=labels_mid1,
    counterclock=False,
    startangle=90,
    colors=[(0, 0.3, 0.3, 1), (0, 0, 0, 0)],
    labeldistance=None,
)
ax.pie(
    outer,
    radius=1,
    wedgeprops=dict(width=0.2, edgecolor="w"),
    labels=labels_outer,
    counterclock=False,
    startangle=90,
    colors=[(0, 0, 0.6, 1), (0, 0, 0, 0)],
    labeldistance=None,
)

ax.set(aspect="equal", title="Duration in seconds")
plt.legend(loc=(-0.3, 0))
fig.savefig("fig.png")