我尝试通过CURL发布multipart/form-data,其中包含,
- 一个JSON对象
- 流对象pdf和jpeg文件
  curl -i -X POST -H  
"Authorization":"eyJhbGciOiJIUzI1NiIsImV4cCI6MTQyNjcwNTY4NiwiaWF0IjoxNDI2NzAyMDg2fQ.eyJpZCI6MTc3fQ.yBwLFez2RnxTojLniL8YLItWVvBb90HF_yfhcsyg3lY" -H    
"Content-Type:application/multipart/form-data" -d '{"user data":  {"preferred_city":"Newyork","within_radious":"5"}}' --data-binary   
"uploaded_documents":@mydocument.pdf http://127.0.0.1:5000/api/city
现在,我需要在flask请求object.i中读取这个多部分数据
 request.data
它确实打印了数据,但我不知道如何读取流对象并将文件存储到磁盘.