Tell me more ×  I am new to python and google app. I have an
already created application in python and google app engine. I
have downloaded source code of the app and customized it. The
source code which i downloaded doesn't have app.yaml and
index.yaml in it. Now i want to know that if i upload my app on
google app engine without app.yaml and index.yaml then is there
any chance that my data on live server get lost. Please show me
right path i am doing any thing wrong. Also i dont know how to
upload a single file on google app engine. Should i have to
upload whole app ? i have used following command for downloading
source code on localhost: download_app -A <your_app_id> -V
<your_app_version> <output-dir> share|improve this question add
comment  1 Answer  up vote 3 down vote accepted  You cannot
upload an application without an app.yaml. The app.yaml file
contains the necessary configurations to run your application
like handlers to use, application ID, runtime, and so on.  Also,
you cannot upload a single fil