appcfg.py -A <YOUR_PROJECT_ID_> update myapp/ doesn't work. I did go to the web page indicated and created an app and saved the project id of the app.
This is what I get in the command line:
/appcfg.py -A *** /media/brancoliticus/08AA4035AA402194/dev/workspace/webdev_go/myapp/
Usage: appcfg.py [options] <action>
appcfg.py: error: Unknown action: '/media/brancoliticus/08AA4035AA402194/dev/workspace/webdev_go/myapp/'
Is that tutorial outdated? Mabe I should go about learning appengine go in a different manner?