Hi r/learnpython !

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I'm currently building small flask app that takes a filled form with image attachments, and posts it to a REST API as multipart/form-data.

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I've managed to make this work with just text fields posting to the endpoint, but now I am trying to add images, and am a bit stuck.

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The file attachments come in as a FileStorage werkzeug data structure ( https://kite.com/python/docs/werkzeug.FileStorage )

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def put_defect(access_token, files, defectname):

post_data = {'project_id': 'xxxx',

'punch_item': {'name': defectname}}

i = 0

post_img = {}

for img in files:

post_img['attachment_item[i]'] = img.read()

i = 1

post_data['attachments'] = post_img

headers = base_headers()

headers.update({"Authorization": "Bearer " access_token})

response = requests.post("https://sandbox.procore.com/vapid/punch_items", headers=headers, json=post_data)

me_json = response.json()

return me_json

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In case you want a better formatted paste: https://pastebin.com/872ak2jB

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For a point of reference, if I make the above post, but don't include post_data['attachments'] in the post data, it works.

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The documentation says I am meant to send the attachments

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Here is the relevant doc for the /vapid/punch_items action: https://developers.procore.com/reference/punch-items#create-punch-item

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Here is a doc that explains how to do it in Postman: https://developers.procore.com/documentation/attachments

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But I just can't wrap my head around how to do it in Python!

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With the code above, I get

TypeError: Object of type bytes is not JSON serializable

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Can someone please push me in the right direction?