Python利用PIL实现多张图片合成gif动画的案例详解

import os
figure_save_path = "file_fig_test"
import warnings
warnings.filterwarnings("error")
import numpy as np
np.random.seed(0)
import matplotlib.pyplot as plt
from PIL import Image
import time
 
num = 100
gif_frames = []
open_time = []
save_time = []
plot_time = []
 
for i in range(num):
    #图形绘制
    start_time = time.time()
    plt.scatter(np.random.random(), np.random.random())
    end_time = time.time()
    plot_time.append(end_time-start_time)
 
    #创建图形保存文件夹
    if not os.path.exists(figure_save_path):
        os.makedirs(figure_save_path)
    else:
        pass
 
    #保存图形
    start_time = time.time()
    plt.savefig(os.path.join(figure_save_path, str(i) + ".jpg"))
    end_time = time.time()
    save_time.append(end_time-start_time)
 
    #打开图形
    start_time = time.time()
    img = Image.open(os.path.join(figure_save_path, str(i) + ".jpg"))
    end_time = time.time()
    open_time.append(end_time-start_time)
 
    gif_frames.append(img)
 
print("动画绘制开始")
start_time = time.time()
gif_frames[0].save("test.gif",
        save_all=True, append_images=gif_frames[1:], duration=200, loop=0)
end_time = time.time()
print("动画绘制完成，用时：", round(end_time-start_time, 6))
print("平均动画绘制完成，用时：", round((end_time-start_time)/num, 6))
 
print("平均图形绘制用时：", round(sum(plot_time)/len(plot_time), 6))
print("平均图形保存用时：", round(sum(save_time)/len(save_time), 6))
print("平均图形打开用时：", round(sum(open_time)/len(open_time), 6))

gif_time = []
for i in range(20, 100):
    new_frames = gif_frames[:i]
    start_time = time.time()
    new_frames[0].save(str(i)+".gif",
        save_all=True, append_images=gif_frames[1:], duration=200, loop=0)
    end_time = time.time()
    gif_time.append(end_time-start_time)
    print("finished:", str(i))