似乎这里没有其他答案可以真正回答这个问题。因此，这是一个使用散点图的代码，并在将鼠标悬停在散点上时显示了注释。
import matplotlib.pyplot as pltimport numpy as np; np.random.seed(1)x = np.random.rand(15)y = np.random.rand(15)names = np.array(list("ABCDEFGHIJKLMNO"))c = np.random.randint(1,5,size=15)norm = plt.Normalize(1,4)cmap = plt.cm.RdYlGnfig,ax = plt.subplots()sc = plt.scatter(x,y,c=c, s=100, cmap=cmap, norm=norm)annot = ax.annotate("", xy=(0,0), xytext=(20,20),textcoords="offset points", bbox=dict(box, fc="w"), arrowprops=dict(arrow))annot.set_visible(False)def update_annot(ind): pos = sc.get_offsets()[ind["ind"][0]] annot.xy = pos text = "{}, {}".format(" ".join(list(map(str,ind["ind"]))), " ".join([names[n] for n in ind["ind"]])) annot.set_text(text) annot.get_bbox_patch().set_facecolor(cmap(norm(c[ind["ind"][0]]))) annot.get_bbox_patch().set_alpha(0.4)def hover(event): vis = annot.get_visible() if event.inaxes == ax: cont, ind = sc.contains(event) if cont: update_annot(ind) annot.set_visible(True) fig.canvas.draw_idle() else: if vis: annot.set_visible(False) fig.canvas.draw_idle()fig.canvas.mpl_connect("motion_notify_event", hover)plt.show()由于人们还希望将此解决方案用于行plot而不是分散，因此以下内容将是相同的解决方案plot（其工作原理略有不同）。
Hide pre snippetimport matplotlib.pyplot as pltimport numpy as np; np.random.seed(1)x = np.sort(np.random.rand(15))y = np.sort(np.random.rand(15))names = np.array(list("ABCDEFGHIJKLMNO"))norm = plt.Normalize(1,4)cmap = plt.cm.RdYlGnfig,ax = plt.subplots()line, = plt.plot(x,y, marker="o")annot = ax.annotate("", xy=(0,0), xytext=(-20,20),textcoords="offset points", bbox=dict(box, fc="w"), arrowprops=dict(arrow))annot.set_visible(False)def update_annot(ind): x,y = line.get_data() annot.xy = (x[ind["ind"][0]], y[ind["ind"][0]]) text = "{}, {}".format(" ".join(list(map(str,ind["ind"]))), " ".join([names[n] for n in ind["ind"]])) annot.set_text(text) annot.get_bbox_patch().set_alpha(0.4)def hover(event): vis = annot.get_visible() if event.inaxes == ax: cont, ind = line.contains(event) if cont: update_annot(ind) annot.set_visible(True) fig.canvas.draw_idle() else: if vis: annot.set_visible(False) fig.canvas.draw_idle()fig.canvas.mpl_connect("motion_notify_event", hover)plt.show()
