时间戳

首页 > 解决方案 > 如何从 powerpoint (python-pptx) 访问图像

python - 如何从 powerpoint (python-pptx) 访问图像

问题描述

我很难尝试使用 python-pptx 库访问/保存图像。因此，如果图像是形状类型PICTURE（即shape.shape_type == MSO_SHAPE_TYPE.PICTURE），我可以使用“blob”属性轻松访问/保存图像。这是代码：

import argparse
import os
from PIL import Image
import pptx
from pptx.enum.shapes import MSO_SHAPE_TYPE
from pptx import Presentation
from mdutils.mdutils import MdUtils
from mdutils import Html

def main():

    parser = argparse.ArgumentParser()
    parser.add_argument('ppt_name', type=str, help='add the name of the PowerPoint file(NOTE: the folder must be in the same directory as the prorgram file')
    args = parser.parse_args()
    
    pptx_name = args.ppt_name
    pptx_name_formatted = pptx_name.split('.')[0]

    prs = Presentation(pptx_name)

    path = '{}_converted'.format(pptx_name_formatted)
    if not os.path.exists(path):
        os.mkdir(path)
    images_folder = '{}_images'.format(pptx_name_formatted)
    images_path = os.path.join(path, images_folder)
    if not os.path.exists(images_path):
        os.mkdir(images_path)

    ppt_dict = {} #Keys: slide numbers, values: slide content
    texts = []
    slide_count = 0
    picture_count = 0
    for slide in prs.slides:
        texts = []
        slide_count += 1
        
        for shape in slide.shapes:
            if shape.has_text_frame:
                if '\n' in shape.text:
                    splitted = shape.text.split('\n')
                    for word in splitted:
                        if word != '':
                            texts.append(word)
                elif shape.text == '':
                    continue
                else:
                    texts.append(shape.text)
            elif shape.shape_type == MSO_SHAPE_TYPE.PICTURE:
                with open('{}/image{}_slide{}.png'.format(images_path, picture_count, slide_count), 'wb') as f:
                    f.write(shape.image.blob)
                    picture_count += 1
            ppt_dict[slide_count] = texts

    ppt_content = ''
    for k,v in ppt_dict.items():
        ppt_content = ppt_content + ' - Slide number {}\n'.format(k)
        for a in v:
            ppt_content = ppt_content + '\t - {}\n'.format(a)

    mdFile = MdUtils(file_name='{}/{}'.format(path,path)) #second argument isn't path, it just shares the path name.
    mdFile.write(ppt_content)
    mdFile.create_md_file()


if __name__ == "__main__":
    main()

问题是当图片的形状类型为“自动形状”时，我尝试了很多方法但无济于事。当我为我知道是图片的形状运行以下代码时：

         if shape.shape_type == MSO_SHAPE_TYPE.AUTO_SHAPE:
                print(shape.auto_shape_type)
                print(shape.fill.type)

#indented because it's in a for loop

它输出RECTANGLE 为shape.auto_shape_type

并且PICTURE对于shape.fill.type

但我现在想要的是保存图片（也许通过编写图像的二进制图像字节流）。有人可以帮忙吗？

标签： pythonpowerpointpython-pptx

解决方案

这是我的方法，感谢scanny。

    for slide in prs.slides:
        slide_count += 1

        slide_parts = list(slide._part.related_parts.keys())
        for part in slide_parts:
            image_part = slide._part.related_parts[part]
            if type(image_part) == pptx.parts.image.ImagePart or pptx.opc.package.Part:
                file_startswith = image_part.blob[0:1]
                if file_startswith == b'\x89' or file_startswith == b'\xff' or file_startswith == b'\x47':
                    with open('{}/image{}_slide{}.png'.format(images_path, picture_count, slide_count), 'wb') as f:
                        f.write(image_part.blob)
                        picture_count += 1

存在检查 PNG、JPEG 或 GIF 的 if 条件，因为pptx.opc.package.Part并不总是图像。

实际上，我认为既然我正在检查 的开头image_part.blob，我认为我不需要包括 sayif type(image_part) == pptx.parts.image.ImagePart or pptx.opc.package.Part:

但只要它工作...

推荐阅读