python pptx 替换ppt里已有的图片

问题：

ppt里已有设置好大小位置的图片，替换成新的。

解决方案如下（来自pptx-replace这个包的源代码）：

from pptx import Presentation

ppt = Presentation('店铺销量.pptx')

shops = ['李宁','森马']

for item,shop in enumerate(shops):

    slide = ppt.slides[item]

    img_name = f'./image/{shop}.jpg'

    shape = slide.shapes[4]

    new_shape = slide.shapes.add_picture(img_name,shape.left,shape.top,shape.width,shape.height)

    new_pic = new_shape._element

    old_pic = shape._element

    old_pic.addnext(new_pic)

    old_pic.getparent().remove(old_pic)

失败方案：网上搜到很多方案不靠谱，多张图片只能更新成一个图片：

方案一：https://www.reddit.com/r/learnpython/comments/11dyerr/replacing_images_in_powerpoint_with_pythong/

rom pptx import Presentation, parts

from pptx.enum.shapes import MSO_SHAPE_TYPE

prs = Presentation('test.pptx')

count = 1

for slide in prs.slides:

    for shape in slide.shapes:

        if shape.shape_type == MSO_SHAPE_TYPE.PICTURE:

            im = parts.image.Image.from_file(f'test{count}.png')

            slide_part, rId = shape.part, shape._element.blip_rId

            image_part = slide_part.related_part(rId)

            image_part.blob = im._blob

            count += 1

prs.save('new.pptx')

方案二：https://github.com/scanny/python-pptx/issues/116

ppt = Presentation(temp_name)

shops = ['李宁','森马']

for item,shop in enumerate(shops):

    slide = ppt.slides[item]

    img_name = f'/image/{shop}.jpg'

    shape = slide.shapes[4]

    imgPic = shape._pic

    imgRID = imgPic.xpath('./p:blipFill/a:blip/@r:embed', namespace=imgPic.nsmap)[0]

    imgPart = slide.part.related_part(imgRID)

    with open(img_name, 'rb') as f:

        rImgBlob = f.read()

    imgPart._blob = rImgBlob