Concurrent pymongo inserts with Eventlet

gistfile1.py

#!/usr/bin/env python

###
### Concurrent pymongo inserts
###

import eventlet
pymongo = eventlet.import_patched('pymongo')

### Setup database connection
dbc = pymongo.Connection()
db = dbc.test

### Prepare concurrent resources
pool = eventlet.GreenPool(1000)

def do(*args, **kwargs):
    db.test_coll.insert(*args)
    dbc.end_request()

for i in xrange(1000):
    pool.spawn_n(do, {'num': i})
pool.waitall()

What version of pymongo is imported here?