我的最终目标是改变演示文稿的主题。为此，我创建了一个源模板和一个新模板（具有正确的主题）。我迭代源模板中的每张幻灯片，然后使用以下代码将包含源内容的新幻灯片添加到新模板中https://stackoverflow.com/a/56074651/3206926 https://stackoverflow.com/a/56074651/3206926。如果有更好的方法来做到这一点，我很想听听。

这对于文本和文本框非常有用，但是测试图像无法在新的 powerpoint 中显示（如下图所示）：

Code

def copy_slide_from_external_prs(self, src, idx, newPrs):

    # specify the slide you want to copy the contents from
    src_slide = src.slides[idx]

    # Define the layout you want to use from your generated pptx
    slide_layout = newPrs.slide_layouts[2]

    # create now slide, to copy contents to
    curr_slide = newPrs.slides.add_slide(slide_layout)


    # remove placeholders
    for p in [s.element for s in curr_slide.shapes if 'Text Placeholder' in s.name or 'Title' in s.name]:
        p.getparent().remove(p)

    # now copy contents from external slide, but do not copy slide properties
    # e.g. slide layouts, etc., because these would produce errors, as diplicate
    # entries might be generated
    for shp in src_slide.shapes:
        el = shp.element
        newel = copy.deepcopy(el)

        curr_slide.shapes._spTree.insert_element_before(newel, 'p:extLst')
    
    return newPrs

我尝试了许多不同的解决方案，并尝试使用创建新图片image.blob源图像中的属性。然而，该图像没有元素。我是否需要将 blob 转换为 PNG 并保存，然后使用保存的 PNG 创建新图像？

必须有更好的方法来做到这一点。再说一次，我只是想改变主题。

这是我开发的解决方法。我首先检查形状是否是图像，如果是，我将图像写入本地目录。然后我使用保存的图像将图片添加到幻灯片中。最后，我删除本地保存的图像。

现在这个 copy_slide 函数适用于图像：

def copy_slide_from_external_prs(src, idx, newPrs):

    # specify the slide you want to copy the contents from
    src_slide = src.slides[idx]

    # Define the layout you want to use from your generated pptx
    SLD_LAYOUT = 5
    slide_layout = prs.slide_layouts[SLD_LAYOUT]

    # create now slide, to copy contents to
    curr_slide = newPrs.slides.add_slide(slide_layout)

    # create images dict
    imgDict = {}

    # now copy contents from external slide, but do not copy slide properties
    # e.g. slide layouts, etc., because these would produce errors, as diplicate
    # entries might be generated
    for shp in src_slide.shapes:
        if 'Picture' in shp.name:
            # save image
            with open(shp.name+'.jpg', 'wb') as f:
                f.write(shp.image.blob)

            # add image to dict
            imgDict[shp.name+'.jpg'] = [shp.left, shp.top, shp.width, shp.height]
        else:
            # create copy of elem
            el = shp.element
            newel = copy.deepcopy(el)

            # add elem to shape tree
            curr_slide.shapes._spTree.insert_element_before(newel, 'p:extLst')

    # add pictures
    for k, v in imgDict.items():
        curr_slide.shapes.add_picture(k, v[0], v[1], v[2], v[3])
        os.remove(k)