How to check available Python libraries on Google App Engine & add more

Question

How to check available Python libraries on Google App Engine & add more?

Is SQLite available or we must use GQL with their database system only?

Thank you in advance.

Answer 1

Afaik, you can only use the GAE specific database.

Answer 2

SQLite is there (but since you cannot write to files, you must use it in a read-only way, or on a :memory: database).

App engine docs do a good job at documenting what's there. You can add any other pure-python library, typically as a zipfile of .py (NOT .pyc) files to upload in the main directory of your app (you can directly import from inside the zipfile, of course).

A few more pure-Python third-party libraries included with app engine are listed and documented here -- the paragraph on zipimport at this URL has a bit more details on the ways and limitations of using zipfiles to add more third-party pure-Python libs to your app.