Update failure in python google app engine

Question

I have successfully installed google app engine SDK for python in ubuntu-15.04. Its working fine for localhost. There is error arise for given command.

$ dev_appserver.py .
INFO     2015-07-21 06:18:19,221 api_server.py:205] Starting API server at: http://localhost:55916
INFO     2015-07-21 06:18:19,224 dispatcher.py:197] Starting module "default" running at: http://localhost:8080
INFO     2015-07-21 06:18:19,236 admin_server.py:118] Starting admin server at: http://localhost:8000
INFO     2015-07-21 06:19:49,695 module.py:809] default: "GET / HTTP/1.1" 200 13

Everything is working fine till now.

When i want to update it, it give an error

$ appcfg.py update .
Usage: appcfg.py [options] update <directory> | [file, ...]

appcfg.py: error: Expected -A app_id when application property in file app.yaml is not set

what does it mean?can someone help me to fix this error?If there is problem of app id then how will i get the app id? Thanks .

Answer 1

The last line of the second dump is telling you that the 'application property' in the config file app.yaml is not set. Add a line in the beginning like this:

application: <name>

where <name> is replaced with your application name. You can also update by using appcfg with the -A tag:

appcfg.py -A <name> update <directory>

, again replacing <name> and <directory> with the desired application name and the project directory where the app.yaml file exists.