python imageio 图片生成gif

#!/bin/python3

import matplotlib.pyplot as plt
import imageio,os

TIME_GAP=0.075 #两帧之间的时间间隔，秒为单位
FILE_PATH="./testwalk/"
BEGIN_INDEX=1
END_INDEX=7
FORMAT=".jpg"

# 返回gif
def create_gif(image_list, gif_name):
    print(image_list)

    frames = []
    for image_name in image_list:
        frames.append(imageio.imread(image_name))
    # Save them as frames into a gif
    imageio.mimsave(gif_name, frames, 'GIF', duration = TIME_GAP)
    return 

# 返回图片路径名的list
def filenames_gen():

    filenames = []
    filenames.append(FILE_PATH+"-2.77555756156e-17.jpg")
    # filenames=(fn for fn in os.listdir('./testwalk') if fn.endswith(FORMAT))
    # filenames=[fn for fn in os.listdir('./testwalk') if fn.endswith(FORMAT)]
    for i in range(BEGIN_INDEX,END_INDEX+1):
        filenames.append(FILE_PATH+str(i/10)+FORMAT)
        filenames.append(FILE_PATH+str(-i/10)+FORMAT)

    filenames.reverse()
    print(filenames)

    return filenames

if __name__ == '__main__':
    create_gif(filenames_gen(),'created_gif.gif' )