How can I get the size of an Amazon S3 bucket using Python (Boto lib)?

Question

I'd like to get the size (in bytes, and # of keys) of an Amazon S3 bucket.
I'm looking for an efficient way to get the size of bucket.

One possible way(which is NOT efficient): I can get the key list of the bucket and sum up the size of each key. This is inefficient when I have thousand of key because I have to look for each key's size.

Is there any efficient solution??

UPDATE:
following code is not what I looking for(because it's not efficient):

bucket = conn.get_bucket("bucket_name")
total_size = 0
for key in bucket.list():
   total_size += key.size

Answer 1

There doesn't seem to be direct call to do that. You can iterate through the keys and sum up.

bucket = conn.get_bucket(self.container)
size = 0
for key in bucket.list():
   size += key.size

This should be used only if the bucket has a small number of keys and the calculation is not performed very often.

Check this (Not Boto) for a more useful option.