pyplot の円グラフをいい感じに描く - 日に日に分からんことが増えていく…

f,a = plt.subplots(nrows=5, ncols=2, figsize=(14, 20))
a = a.ravel()
for idx,ax in enumerate(a):
    v_list = km_center[idx]
    df_timeband_meanrate = pd.DataFrame(
        {
            'timeband': name_list,
            'rate': v_list
        },
    )
    print(idx, np.bincount(y_km)[idx])
    display(df_timeband_meanrate)
    ax.pie(df_timeband_meanrate["rate"], labels=['' for i in range(8)],autopct='%.2f %%')
    ax.set_title('cluster: {}, number: {}'.format(idx, np.bincount(y_km)[idx]))
    ax.legend(loc="upper left", bbox_to_anchor=(0.85,1.025), labels=df_timeband_meanrate["timeband"])

plt.tight_layout( )
plt.savefig('time_cluster_center.png', dpi=100)
plt.show()