''' 绘制动画
'''
import numpy as np
import matplotlib.pyplot as plt
from matplotlib import animation
import networkx as nx
import random
fig, ax = plt.subplots()
G = nx.Graph()
G.add_edge(0,1)
def init_network():
# nx.draw(G, node_size=10, node_color='c')
return G,
def animate_network(i):
# 定义网络动态变化的几种形式，分别代表删除边，删除节点，维持不动，增加节点，增加边
d = [-2, -1, 0, 1, 2]
# 从中随机选择一种操作
c = random.randint(0,len(d)-1)
edges = list(G.edges())
nodes = list(G.nodes())
if d[c] == -2:
if edges:
u,v = random.choice(edges)
G.remove_edge(u,v)
if d[c] == -1:
if nodes:
node = random.choice(nodes)
G.remove_node(node)
if d[c] == 0:
# 网络不发生变化
pass
if d[c] == 1:
G.add_node(len(nodes))
if d[c] == 2:
if nodes:
G.add_edge(len(nodes), random.choice(nodes))
nx.draw(G, pos = nx.spring_layout(G), node_size=10, node_color='c',edge_color='grey')
return G,
ani = animation.FuncAnimation(fig=fig, func=animate_network, frames=30, init_func=init_network, interval=100, blit=False,)
ani.save('basic_animation.mp4', fps=30, extra_args=['-vcodec', 'libx264'])
plt.show()
