Create directories in Amazon S3 using python, boto3

Question

I know S3 buckets not really have directories because the storage is flat. But it is possible to create directories programmaticaly with python/boto3, but I don't know how. I saw this on a documentary :

"Although S3 storage is flat: buckets contain keys, S3 lets you impose a directory tree structure on your bucket by using a delimiter in your keys. For example, if you name a key ‘a/b/f’, and use ‘/’ as the delimiter, then S3 will consider that ‘a’ is a directory, ‘b’ is a sub-directory of ‘a’, and ‘f’ is a file in ‘b’."

I can create just files in the a S3 Bucket by :

    self.client.put_object(Bucket=bucketname,Key=filename) 

but I don't know how to create a directory.

Answer 1

Just a little modification in key name is required. self.client.put_object(Bucket=bucketname,Key=filename)

this should be changed to

self.client.put_object(Bucket=bucketname,Key=directoryname/filename)

Thats all.

Answer 2

If you read the API documentation You should be able to do this.

import boto3  s3 = boto3.client("s3")  BucketName = "mybucket" myfilename = "myfile.dat" KeyFileName = "/a/b/c/d/{fname}".format(fname=myfilename)  with open(myfilename) as f :    object_data = f.read()   client.put_object(Body=object_data, Bucket=BucketName, Key=KeyFileName) 

Honestly, it is not a "real directory", but preformat string structure for organisation.