python-pptx处理替换文本

 python中使用python-ppt库操作ppt来替换文本内容，包括图片在前方的

from pptx import Presentation
from pptx.enum.shapes import MSO_SHAPE_TYPE

def ppt_catch_format_text(filename):
    """
    抓取PPT的内容，按段落返回
    其中 filename 是PPT文件的路径
    """
    search_str = '我是'
    repl_str = 'PPT啦'
    prs = Presentation(filename)
    for x in range(len(prs.slides)):
        # ---Only on text-boxes outside group elements---
        for shape in prs.slides[x].shapes:
            if hasattr(shape, "text"):
                if(shape.text.find(search_str))!=-1:
                    text_frame = shape.text_frame
                    cur_texts = text_frame.paragraphs[0].runs
                    for index in range(len(cur_texts)):
                        print(text_frame.paragraphs[0].runs[index].text)
                        if(cur_texts[index].text.find(search_str))!=-1:
                            #print(5566)
                            #print(cur_texts[index].text)
                            cur_text = text_frame.paragraphs[0].runs[index].text
                            new_text = cur_text.replace(str(search_str), str(repl_str))
                            text_frame.paragraphs[0].runs[index].text = new_text

        # ---Only operate on group shapes---
        group_shapes = [shp for shp in prs.slides[x].shapes
                        if shp.shape_type ==MSO_SHAPE_TYPE.GROUP]
        #print(group_shapes)
        for group_shape in group_shapes:
            for shape in group_shape.shapes:
                if shape.has_text_frame:
                    if(shape.text.find(search_str))!=-1:
                        text_frame = shape.text_frame
                       # cur_texts = text_frame.paragraphs[0].runs

                        for index in range(len(text_frame.paragraphs)):
                            cur_text = text_frame.paragraphs[index].text
                            #print(cur_texts[index].text.encode('utf-8').strip().decode())
                            if(cur_text.find(search_str))!=-1:
                                print(7788)
                                #print(cur_texts[index].text)
                                new_text = cur_text.replace(str(search_str), str(repl_str))
                                text_frame.paragraphs[index].text = new_text
                                #print(cur_text)
    #prs.save('ss.pptx')



ppt_catch_format_text('s.pptx')