复制带有图像的幻灯片python pptx [英] Copy slide with images python pptx

问题描述

我的最终目标是更改演示文稿的主题.为此，我创建了一个源模板和一个新模板(具有正确的主题).我遍历源模板中的每张幻灯片，然后使用以下代码将新幻灯片添加到具有源内容的新模板中-源.如果有更好的方法可以做到这一点，我很想听听.

My end goal is to change the theme of a presentation. To do this, I have created a source template and new template (with the correct theme). I iterate over each slide in the source template then add a new slide to the new template with the contents of the source using the code below - source. If there is a better way to do this I'd love to hear it.

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

This works great for text and text boxes, however the test image cannot be displayed in the new powerpoint (show in the image below):

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，并尝试使用源图像中的image.blob属性创建新的图片.但是，该图像没有元素.我是否需要将Blob转换为PNG，保存它，然后使用保存的PNG创建新图像?

I was trying many different solutions and tried creating a new Picture using the image.blob property in the source image. However, then the image does not have an element. Do I need to convert the blob to a PNG, save it, then create a new image using that saved PNG?

必须有一种更好的方法来执行此操作.同样，我只想更改主题.

There must be a better way to do this. Again, I just want to change the theme.

提前谢谢！

推荐答案

这是我开发的解决方法.我首先检查形状是否为图像，如果是，则将图像写入本地目录.然后，我使用保存的图像将照片添加到幻灯片中.最后，我删除了本地保存的图像.

Here is the workaround I developed. I first check if the shape is an image, and if it is, I write the image to a local directory. Then I add a picture to the slide using that saved image. Finally, I delete the locally saved image.

现在，此copy_slide函数适用于图像:

Now this copy_slide function works for images:

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)

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