GA Reporting API v3 - "invalid_grant" error after transfer from Python 2.7 to Python 2.6 environment.

[Micah M]

I am getting an "invalid_grant" issue with my Server-to-Server OAuth2.0 and GA Service Account. I can successfully log in and download my data in my virtualenv running python 2.7, but when I ported it to my server on running python 2.6, I get this error. 

Traceback (most recent call last):

  File "ga_test.py", line 48, in <module>

    service = build('analytics','v3',http=http)

  File "/home/mmangione/cron/salesforce/sfdev_env/lib/python2.6/site-packages/oauth2client/util.py", line 128, in positional_wrapper

    return wrapped(*args, **kwargs)

  File "/home/mmangione/cron/salesforce/sfdev_env/lib/python2.6/site-packages/apiclient/discovery.py", line 192, in build

    resp, content = http.request(requested_url)

  File "/home/mmangione/cron/salesforce/sfdev_env/lib/python2.6/site-packages/oauth2client/util.py", line 128, in positional_wrapper

    return wrapped(*args, **kwargs)

  File "/home/mmangione/cron/salesforce/sfdev_env/lib/python2.6/site-packages/oauth2client/client.py", line 475, in new_request

    self._refresh(request_orig)

  File "/home/mmangione/cron/salesforce/sfdev_env/lib/python2.6/site-packages/oauth2client/client.py", line 653, in _refresh

    self._do_refresh_request(http_request)

  File "/home/mmangione/cron/salesforce/sfdev_env/lib/python2.6/site-packages/oauth2client/client.py", line 710, in _do_refresh_request

    raise AccessTokenRefreshError(error_msg)

oauth2client.client.AccessTokenRefreshError: invalid_grant

My main routine is: 

import datetime, httplib2, os, sys, time

from apiclient.discovery import build

from oauth2client.client import SignedJwtAssertionCredentials

#=================================================================================

# Step 1. Declare constants, import files and variables.

#=================================================================================

# Dates for use with Google Analytics

today = datetime.datetime.today().strftime('%Y-%m-%d')

yesterday = datetime.date.fromordinal(datetime.date.today().toordinal()-1).strftime('%Y-%m-%d')

# Configure login details for SalesForce

wd = os.path.dirname(os.path.realpath('ga_test.py'))

# Read the GA private key into memory. 

KEY_LOCATION = os.path.join(wd,'privatekey','ga_test.pem')

f = file(KEY_LOCATION, 'rb')

KEY = f.read()

f.close()

#=================================================================================

# Step 2. Login to Google Analytics, retrieve data.

#=================================================================================

LOGIN = '<REMOVED FOR GOOGLE POST>developer.gserviceaccount.com'           # Email from Google API Console.

SCOPE = 'https://www.googleapis.com/auth/analytics.readonly'   # Log in to Google Analytics with read-only access.

# Build the Signed JWT Credentials for OAuth2.0

credentials = SignedJwtAssertionCredentials(LOGIN,KEY,SCOPE)

http = httplib2.Http()

http = credentials.authorize(http)

# Build GA service

service = build('analytics','v3',http=http)

The results of pip freeze are:

 

apiclient==1.0.2

argparse==1.2.1

google-api-python-client==1.1

httplib2==0.8

ipython==0.13.2

pyOpenSSL==0.13

pyasn1==0.1.7

pycrypto==2.6

python-gflags==2.0

wsgiref==0.1.2

Hopefully that's enough information. Why would this work on Python 2.7, but not 2.6?

Thanks!