with open("dropbox.txt") as f:
    app_key,app_secret = f.readlines()
app_key,app_secret = app_key.strip(),app_secret.strip()

import dropbox

flow = dropbox.client.DropboxOAuth2FlowNoRedirect(app_key, app_secret)

authorize_url = flow.start()
print '1. Go to: ' + authorize_url
print '2. Click "Allow" (you might have to log in first)'
print '3. Copy the authorization code.'

code = raw_input("Enter the authorization code here: ").strip()

access_token, user_id = flow.finish(code)

client = dropbox.client.DropboxClient(access_token)
print 'linked account: ', client.account_info()['display_name']

fname = "github-wolverine.jpg"
f, metadata = client.get_file_and_metadata('/' + fname)
out = open(fname, 'wb')
out.write(f.read())
out.close()
print metadata['size']

from IPython.core.display import Image 
Image(filename=fname)