quickly delete keys in s3

s3_delete.py

#!/usr/bin/env python

import eventlet
eventlet.monkey_patch()

import boto
import sys
import Queue

conn = boto.connect_s3('s3 creds', 'go here')

def delete_key(q):
    count = 0
    while True:
        try:
            key = q.get_nowait()
            if key is None:
                break
        except Queue.Empty:
            eventlet.sleep(.1)
        else:
            key.delete()
            count += 1
            sys.stdout.write('.')
            if count % 10 == 0:
                sys.stdout.flush()
results = []
q = Queue.Queue()
for bucket in conn.get_all_buckets():
    print 'starting delete for bucket %s' % bucket.name
    for i, key in enumerate(bucket.get_all_keys()):
        q.put(key)
    print 'queued %d items' % (i+1)
pool = eventlet.GreenPool(size=50)
for _ in range(50):
    results.append(pool.spawn(delete_key, q))
    q.put(None)
[x.wait() for x in results]
for bucket in conn.get_all_buckets():
    try:
        bucket.delete()
        print 'deleted bucket %s' % bucket.name
    except:
        pass