using a service account returns empty set

[Mike (gotmike.com)]

i'm using a service account to successfully access the webmaster tools api via python.

my code is below.

problem is that all i receive is an empty set "{}" for the line "print site_list"

when i use the google api explorer in a browser, i get two sites.

any ideas?  please note i get an error on the following line of code, b/c we cannot cycle through an empty set.

import json

from httplib2 import Http

from oauth2client.client import SignedJwtAssertionCredentials

from apiclient.discovery import build

client_email = 'XX...@developer.gserviceaccount.com'

with open("privatekey.pem") as f:

  private_key = f.read()

credentials = SignedJwtAssertionCredentials(client_email, private_key,

    'https://www.googleapis.com/auth/webmasters.readonly')

http = Http()

credentials.authorize(http)

webmasters_service = build('webmasters', 'v3', http=http)

# Retrieve list of websites in account

site_list = webmasters_service.sites().list().execute()

print site_list

# Remove all unverified sites

verified_sites_urls = [s['siteUrl'] for s in site_list['siteEntry'] if s['permissionLevel'] != 'siteUnverifiedUser']

# This is just ALL sites, not just verified sites

sites_urls = [s['siteUrl'] for s in site_list['siteEntry']]

print verified_sites_urls

# Printing the urls of all sites you are verified for.

for site_url in verified_sites_urls:

        print site_url

        # Retrieve list of sitemaps submitted

        sitemaps = webmasters_service.sitemaps().list(siteUrl=site_url).execute()

        if 'sitemap' in sitemaps:

                sitemap_urls = [s['path'] for s in sitemaps['sitemap']]

                print " " + "\n ".join(sitemap_urls)

[mikael...@leadingfellows.com]

Hello,

i've got exactly the same behavior  (got almost the same sample code),

i've got some validated websites in my webmasters tools dashboard,

and the "sites()" fonction from the service object returns an empty result. 

thanks in advance,