Can I post an array of files using form/multipart in Python?

Question

For example: I need to post data in such a format: {imgFiles:[(filename, file), (filename, file), (flename file)]

I have tried to do it like this:

pic_array = [
    ('file1', open("somefile.xml", "r")),
    ('file2', open("somefile2.xml", "r"))
]
files_pics = [('imgFiles', pic_array)]

r = requests.post(
    'https://some.site/path/to/api/point',
    data=data_details,
    headers=headers_1,
    files=files_pics
)
print(r.status_code, r.reason, r.json())

and get a

 Traceback (most recent call last):
 File "C:/Users/someusername/PycharmProjects/someprojectname/data_load.py", line 115, in <module>

 File "C:\ProgramData\Anaconda3\lib\site-packages\requests\api.py", line 116, in post
return request('post', url, data=data, json=json, **kwargs)
 File "C:\ProgramData\Anaconda3\lib\site-packages\requests\api.py", line 60, in request
return session.request(method=method, url=url, **kwargs)
 File "C:\ProgramData\Anaconda3\lib\site-packages\requests\sessions.py", line 519, in request
prep = self.prepare_request(req)
 File "C:\ProgramData\Anaconda3\lib\site-packages\requests\sessions.py", line 462, in prepare_request
hooks=merge_hooks(request.hooks, self.hooks),
 File "C:\ProgramData\Anaconda3\lib\site-packages\requests\models.py", line 316, in prepare
self.prepare_body(data, files, json)
 File "C:\ProgramData\Anaconda3\lib\site-packages\requests\models.py", line 504, in prepare_body
(body, content_type) = self._encode_files(files, data)
 File "C:\ProgramData\Anaconda3\lib\site-packages\requests\models.py", line 151, in _encode_files
fn, fp, ft, fh = v
ValueError: not enough values to unpack (expected 4, got 1)

Is there any way to post files exactly as array?

This error message is meaningless without context. Please post the full traceback — ForceBru
– ForceBru, Commented Feb 11, 2019 at 13:41

MarkReedZ · Accepted Answer · 2019-02-11 14:52:00Z

2

You are sending multiple files incorrectly see the following working example. If I take my example and change it to a list like yours I get the same error.

import requests

url = 'http://localhost:8080/'
files = {'file':  open('sql.py', 'rb'),
         'file2': open('lst.py', 'rb')}

r = requests.post(url, files=files)
print(r.text)

answered Feb 11, 2019 at 14:52

MarkReedZ

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1 Comment

James Newborn Over a year ago

The point is the server API accepts files ONLY in this format: {key1:value1,key2:value2,imgFiles:[(filename,file), (filename2,file2), .., (filenameN,fileN)]}

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