pipeline.concatenate_markdown_pages执行后报write() argument must be str, not MarkdownResult

[oreo1024]

使用教程给的代码（如下）在最新版本中执行会报：Traceback (most recent call last): File "/root/autodl-tmp/testgpu.py", line 76, in f.write(markdown_texts) TypeError: write() argument must be str, not MarkdownResult
发现markdown_texts为MarkdownResult类型，之前的版本为str类型，这要怎么修改，如果直接改成str(markdown_texts)发现输出的文件里面是json数据而非md数据。

from pathlib import Path
from paddleocr import PPStructureV3

input_file = "./your_pdf_file.pdf"
output_path = Path("./output")

pipeline = PPStructureV3()
output = pipeline.predict(input=input_file)

markdown_list = []
markdown_images = []

for res in output:
md_info = res.markdown
markdown_list.append(md_info)
markdown_images.append(md_info.get("markdown_images", {}))

markdown_texts = pipeline.concatenate_markdown_pages(markdown_list)

mkd_file_path = output_path / f"{Path(input_file).stem}.md"
mkd_file_path.parent.mkdir(parents=True, exist_ok=True)

with open(mkd_file_path, "w", encoding="utf-8") as f:
f.write(markdown_texts)

for item in markdown_images:
if item:
for path, image in item.items():
file_path = output_path / path
file_path.parent.mkdir(parents=True, exist_ok=True)
image.save(file_path)