I was thinking about deleting and then re-creating bucket (bad option which I realised later).
Then how can delete all objects from the bucket?
I tried this : http://boto3.readthedocs.io/en/latest/reference/services/s3.html#S3.Bucket.delete_objects
But it deletes multiple objects not all.
can you suggest what is the best way to empty bucket ?
Just use aws cli.
aws s3 rm s3://mybucket --recursive
Well, for longer answer if you insists to use boto3. This will send a delete marker to s3. No folder handling required. bucket.Object.all will create a iterator that not limit to 1K .
import boto3
s3 = boto3.resource('s3')
bucket = s3.Bucket('my-bucket')
# suggested by Jordon Philips
bucket.objects.all().delete()