import numpy as np
import matplotlib.pyplot as plt
from matplotlib.animation import FuncAnimation

data = {f'20{i:02d}年': np.random.randint(30, 80, 12) for i in range(25)}
fig, ax = plt.subplots()
bars = ax.barh(range(1,13), [0]*12)

def init():
    return bars

def update(year):
    plt.cla()                         # 清除轴域上的图形
    values = data[year]               # 获取数据，按数值大小排序
    temp = sorted(zip(range(1,13), values), key=lambda item:item[1])
    x = [item[0] for item in temp]
    y = [item[1] for item in temp]
    plt.barh(range(1,13), y)    
    plt.title(year, fontproperties='simhei', fontsize=24)
    plt.xticks(range(0,101,10))
    plt.yticks(range(1,13), [f'{i}月' for i in x],
                fontproperties='simhei', fontsize=16)
    # 在水平柱状图右侧显示对应的数值
    for xx, yy in zip(range(1,13),y):
        plt.text(yy+0.1, xx-0.1, str(yy))
    plt.draw()                        # 重新绘制图形
    return bars

ani = FuncAnimation(fig=fig, func=update, frames=data.keys(),
                    init_func=init, interval=500, blit=True)
ani.save('bars.gif', writer='imagemagick')