test_upload.py

#!/usr/bin/env python

import requests
from requests_oauthlib import OAuth1 as OAuth
import urllib
import json

CLIENT_KEY = u'REDACTED'
CLIENT_SECRET = u'REDACTED'
BASE_URL = u'https://api.projectplace.com/'
access_token_key = u'REDACTED'
access_token_secret = u'REDACTED'

oauth = OAuth(CLIENT_KEY, client_secret=CLIENT_SECRET, resource_owner_key=access_token_key,
              resource_owner_secret=access_token_secret)

r = requests.post(url=BASE_URL + '2/documents/1069865/upload',
                  files={'file': open('hej-fil-med-åäö.txt', 'rb')},
                  auth=oauth)
try:
    print(json.dumps(r.json(), sort_keys=True, indent=4, separators=(',', ': ')))
    print(r.request.body)
    print(r.request.headers)
except:
    print(r.content)