pip install Pillow

from PIL import Image

im=Image.open("t.jpg")

im.rotate(90).show()

from PIL import Image

import glob, os

size = 128, 128

for infile in glob.glob("*.jpg"):

    file, ext = os.path.splitext(infile)

    im = Image.open(infile)

    im.thumbnail(size, Image.ANTIALIAS)

    im.save(file + ".thumbnail.jpg", "JPEG")

from PIL import Image

def fill_image(image):

    width, height = image.size

    # 选取长和宽中较大值作为新图片的边长

    new_image_length = width if width > height else height

    # 生成新图片[白底]，底色可配置其他颜色

    new_image = Image.new(image.mode, (new_image_length, new_image_length), color='white')

    # 将之前的图片input image 粘贴在新图上，居中

    if width > height: # 原图宽大于高，则填充图片的竖直维度  #(x,y)二元组表示粘贴上图相对下图的起始位置,是个坐标点

        new_image.paste(image, (0, int((new_image_length - height) / 2)))

    else:

        new_image.paste(image, (int((new_image_length - width) / 2), 0))

    return new_image

def cut_image(image):

    width, height = image.size

    item_width =int(width /3) # 因为朋友圈一行放3张图

    box_list = []

    for i in range(0, 3):

        for j in range(0, 3):

            box = (j*item_width, i*item_width, (j+1)*item_width, (i+1)*item_width) # (left, top, right, bottom)

            box_list.append(box)

    image_list = [image.crop(box) for box in box_list]

    return image_list

def save_images(image_list):

    index = 1

    for image in  image_list:

        image.save(str(index) + '.png', 'PNG')

        index += 1

if __name__ == '__main__':

    file_path = "t.jpg"  # 把目标图片 input image 放到代码所处的文件夹里

    image = Image.open(file_path)

    image = fill_image(image)

    image_list = cut_image(image)

    save_images(image_list)