MongoDB shell's db.stats() in php and python

This is how you do it in Python if you are using the PyMongo driver:

connection = pymongo.Connection(host = "127.0.0.1", port = 27017)
db = connection["test_db"]
test_collection = db["test_collection"]
db.command("dbstats") # prints database stats for "test_db"
db.command("collstats", "test_collection") # prints collection-level stats for "test_collection" under "test_db".  

References:

db.command()

MongoDB: how to get db.stats() from API

This is how you do it in PHP

$con= new Mongo()

$stats=$con->dbName->command(array('dbStats' => 1));  // for db.stats()

$stats=$con->dbName->command(array('collStats' => 'collection_name')); // for db.collection_name.stats()

But how to do this in python?