python plot画图不重复颜色

import matplotlib
import matplotlib.pyplot as plt


cmap = matplotlib.cm.get_cmap('tab20')

然后在pyplot方法中使用

例如

patches, texts, autotexts = plt.pie(sizes, labels=[""]*len(sizes), \
            autopct='%1.1f%%', shadow=False, pctdistance=0.85, \
            startangle=90, textprops={'fontsize': 12, 'color': 'black'},colors=cmap.colors)