How does one get a count of rows in a Datastore model in Google App Engine?

Question

I need to get a count of records for a particular model on App Engine. How does one do it?

I bulk uploaded more than 4000 records but modelname.count() only shows me

Answer 1

This is a very old thread, but just in case it helps other people looking at it, there are 3 ways to accomplish this:

1. Accessing the Datastore statistics
2. Keeping a counter in the datastore
3. Sharding counters

Each one of these methods is explained in this link.