GAE app identity, version and deploy time example

gistfile1.py

# config
def _APP_VERSION():
    if on_development_server or not on_server:
        return "0", 0
    else:
        version_time = os.environ['CURRENT_VERSION_ID']
        return (version_time.find('.') > -1 and version_time.split('.')) or (version_time, -1)
config.APP_VERSION = _APP_VERSION()
 
# Useage in a handler
class MainHandler(RequestHandler):
    (version, deploy_epoch) = config.APP_VERSION
    deploy_timestamp = long(deploy_epoch) / pow(2, 28)
 
    # Note this will be a nonsensical value on the dev/sdk server
    when_deployed = datetime.fromtimestamp(deploy_timestamp).strftime("%d/%m/%y %X")
 
    def get(self):
        render_template(self.response, 'main.html', {'version': self.version,
                                                     "when_deployed": self.when_deployed,
                                                     'home_view': True,
                                                     'logout_url': users.create_logout_url('/')})