title: Determine what project id my App Engine code is running on
body: <p>From within an App Engine app, is there a way to determine the project ID a GAE (App Engine) instance is running on? </p>
  
  <p>I want to access a big query table in the same project that the App Engine instance is running in. I'd rather not hard code it in or include it in another config file if possible. </p>
  
  <p>Edit: forgot to mention that this is from Python</p>