Amazon S3 boto - how to delete folder?

I feel that it's been a while and boto3 has a few different ways of accomplishing this goal. This assumes you want to delete the test "folder" and all of its objects Here is one way:

s3 = boto3.resource('s3')
objects_to_delete = s3.meta.client.list_objects(Bucket="MyBucket", Prefix="myfolder/test/")

delete_keys = {'Objects' : []}
delete_keys['Objects'] = [{'Key' : k} for k in [obj['Key'] for obj in objects_to_delete.get('Contents', [])]]

s3.meta.client.delete_objects(Bucket="MyBucket", Delete=delete_keys)

This should make two requests, one to fetch the objects in the folder, the second to delete all objects in said folder.

https://boto3.readthedocs.org/en/latest/reference/services/s3.html#S3.Client.delete_objects

Here is 2018 (almost 2019) version:

s3 = boto3.resource('s3')
bucket = s3.Bucket('mybucket')
bucket.objects.filter(Prefix="myprefix/").delete()

There are no folders in S3. Instead, the keys form a flat namespace. However a key with slashes in its name shows specially in some programs, including the AWS console (see for example Amazon S3 boto - how to create a folder?).

Instead of deleting "a directory", you can (and have to) list files by prefix and delete. In essence:

for key in bucket.list(prefix='your/directory/'):
    key.delete()

However the other accomplished answers on this page feature more efficient approaches.

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Notice that the prefix is just searched using dummy string search. If the prefix were your/directory, that is, without the trailing slash appended, the program would also happily delete your/directory-that-you-wanted-to-remove-is-definitely-not-t‌​his-one.

For more information, see S3 boto list keys sometimes returns directory key.