思路很简单：就是给本地的图片上传到图床上，然后再复制过来，就没问题了。
    代码：

    1. import requests
    2. from requests_toolbelt.multipart.encoder import MultipartEncoder
    3. import random
    4. import re
    5. import urllib
    6. import time
    7. from tqdm import tqdm
    9. def upload2danke(filePath):  # https://imgkr.com/
    10.     filename = filePath.split("/")[-1]
    11.     ck_time = str(time.time())[:10]
    12.     url = "https://imgkr.com/api/files/upload"
    13.     cookies = {"_ga": "GA1.2.1950159671.{}".format(ck_time), "_gid": "GA1.2.1236723023.{}".format(ck_time)}
    14.     headers = {"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:71.0) Gecko/20100101 Firefox/71.0",
    15.                "Accept": "*/*", "Accept-Language": "zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2",
    16.                "X-Requested-With": "XMLHttpRequest", "Origin": "https://imgkr.com", "Connection": "close",
    17.                "Referer": "https://imgkr.com/"}
    18.     data = MultipartEncoder(
    19.         fields={
    20.             "file": (filename, open(filePath, 'rb'), 'application/octet-stream')
    21.         },
    22.         boundary="-----------------------------{}".format(random.randint(1e13, 1e14 - 1)))
    23.     headers['Content-Type'] = data.content_type
    24.     req = requests.post(url, headers=headers, cookies=cookies, data=data)
    25.     res = req.json()
    26.     if res['code'] == 200:
    27.         return res['data']
    28.     else:
    29.         return None
    32. # 提取markdown中的其他链接
    33. def extractUrl(markdown_file_path):
    34.     f = open(markdown_file_path, 'rb')
    35.     markdown_content = f.read()
    36.     f.close()
    37.     url_regex = b"!\[.*?\]\((.*?)\)"
    38.     all_image_url = re.findall(url_regex, markdown_content)
    39.     all_image_url = [image.decode('utf-8', 'ignore') for image in all_image_url]
    40.     return all_image_url
    43. # 将旧链接替换为新链接，前面为旧的图片url集合，后面为新的url集合，替换后写入 原来的文档名_new 中
    44. def exchange_url(markdown_file_path, all_image_url, all_danke_image_url):
    45.     f = open(markdown_file_path, 'rb')
    46.     markdown_content = f.read()
    47.     f.close()
    49.     # 替换
    50.     for old_img, new_img in zip(all_image_url, all_danke_image_url):
    51.         markdown_content = markdown_content.replace(old_img.encode(), new_img.encode())
    52.     # 写入     
    53.     f = open(f"{markdown_file_path}.txt", 'wb')
    54.     f.write(markdown_content)
    55.     f.close()
    57.     print(f"save at {markdown_file_path}.txt")
    60. if __name__ == '__main__':
    61.     markdown_file_path = input("markdown file path: ")
    62.     markdown_path = markdown_file_path.replace(markdown_file_path.split("/")[-1], "")   # 后面拼接图片变成绝对路径
    64.     all_image_url = extractUrl(markdown_file_path)
    65.     all_unquote_image_url = [urllib.parse.unquote(img) for img in all_image_url]    # URL解码，不然路径识别可能存在问题
    66.     all_danke_image_url = [upload2danke(markdown_path+img) for img in tqdm(all_unquote_image_url, desc="上传中", ncols=100)]
    68.     exchange_url(markdown_file_path, all_image_url, all_danke_image_url)

    image.png
    image.pngs