in yampy python yammer api images are only viewable if logged in

the yampy yammer package for python allows you get the url to images in messages. However these images are only viewable if you are logged in.

I have access to message content via the api with an access token, but how do I download the images?

    import yampy
import pprint
from werkzeug.wrappers import Request, Response
from datetime import datetime
import textwrap
import os,webbrowser
from flask import Flask
from flask import jsonify
pp = pprint.PrettyPrinter(indent=4)
authenticator = yampy.Authenticator(client_id="asdfadsfasdfsdf",
                                    client_secret="asdfasdfasdf")
app = Flask(__name__)
redirect_uri = "https://localhost:8000/yammerasdf/api/v1/redirect"
# auth_url = authenticator.authorization_url(redirect_uri=redirect_uri)
# access_token = authenticator.fetch_access_token(code)
# access_data = authenticator.fetch_access_data(code)
# access_token = access_data.access_token.token
# user_info = access_data.user
# network_info = access_data.network
yammer = yampy.Yammer(access_token="asdfasdfasdfsd-asdfasdfadsf")
@app.route("/")
def hello():
    messages = yammer.messages.from_user(2323423432, older_than=None, newer_than=None, limit=3, threaded=1)
    # asdfmessages = yammer.messages.from_user(1663406272)
    allposts = ''
    messagesdata= []
    for message in messages.messages:
        post= '<div class="chat-body clearfix"><div class="header"><strong class="primary-font">asdfasdfdsf</strong>'
        d1= message.created_at.split()[0]
        d = datetime.strptime(d1, '%Y/%m/%d')
        day_string = d.strftime('%A, %B %d')
        post+= '<small class="pull-right text-muted">' + day_string + '</small></div>'
        post+='<p style="margin-top:10px"><a href="' + message.web_url + '" target="_blank" style="font-size:13px;padding:15px" class="thumbnail">'
        messageimages = []
        for image in message.attachments:
            webbrowser.open(image.image.url)
            # urllib.request.urlretrieve(image.image.url)
            # urllib.urlretrieve(image.image.url, "local-filename.jpg")
            post+='<img src="' + image.image.url + '">'
            messageimages.append(image.image.url)
        post+=  textwrap.wrap(message.content_excerpt, 120)[0] + '...</a></p></div><hr>'
        allposts += post
        messagedict = {'date':day_string, 'url':message.web_url, 'images':messageimages, 'content':textwrap.wrap(message.content_excerpt, 120)[0]}
        messagesdata.append(messagedict.copy())
    # messagesdata=['html',allposts]
    return jsonify(messagesdata)
if __name__ == '__main__':
    from werkzeug.serving import run_simple
    port = int(os.environ.get('PORT', 5000))
    app.run(host='0.0.0.0', port=port)
    # run_simple('localhost', port, app)

Yampy only delivers back data as json format. To download the image you need the raw response and a stream. To do this you can use requests and shutil instead:

import requests
import shutil

headers = {"Authorization": "Bearer " + access_token}
response = requests.get("yammer_image_url", headers=headers, stream=True)
with open("path_to_new_image.jpg", "wb") as f:
    response.raw.decode_content = True
    shutil.copyfileobj(response.raw, f)