python xycoords_python可视化节点关系（三）：matplotlib（2）鼠标交互

实现鼠标交互

1. 实现鼠标点击节点高亮

直接上代码：

# -*- coding: utf-8 -*-

# -*- coding: utf-8 -*-

import matplotlib.pyplot as plt

from matplotlib.patches import Rectangle

import numpy as np

fig, ax = plt.subplots(figsize=(10,10))

node_pos = [(1, 0), (0, 1), (2,1), (1,2)]

bbox_args = dict(boxstyle="round", fc="0.8")

arrow_args = dict(arrowstyle="->")

an1 = plt.annotate(s="Test 1\n(node1,node2)\n(node3,node4,node5)\n\n\n", xy=node_pos[0], xycoords="data",

va="center", ha="center",

bbox=dict(boxstyle="round", fc="w", facecolor='green'))

an2 = plt.annotate(s="Test 2\n(node1,node2)", xy=node_pos[1], xycoords="data",

va="center", ha="center",

bbox=dict(boxstyle="round", fc="w", facecolor='green'))

arrow1 = plt.annotate('', xy=(0, 0), xycoords=an1,

xytext=(0, 0), textcoords=an2, # an1 -> an2

size=20, ha="center", va="