Listing contents of a bucket with boto3

How can I see what's inside a bucket in S3 with boto3? (i.e. do an "ls")?

Doing the following:

import boto3
s3 = boto3.resource('s3')
my_bucket = s3.Bucket('some/path/')

returns:

s3.Bucket(name='some/path/')

How do I see its contents?

Solution 1:

One way to see the contents would be:

for my_bucket_object in my_bucket.objects.all():
    print(my_bucket_object)

Solution 2:

This is similar to an 'ls' but it does not take into account the prefix folder convention and will list the objects in the bucket. It's left up to the reader to filter out prefixes which are part of the Key name.

In Python 2:

from boto.s3.connection import S3Connection

conn = S3Connection() # assumes boto.cfg setup
bucket = conn.get_bucket('bucket_name')
for obj in bucket.get_all_keys():
    print(obj.key)

In Python 3:

from boto3 import client

conn = client('s3')  # again assumes boto.cfg setup, assume AWS S3
for key in conn.list_objects(Bucket='bucket_name')['Contents']:
    print(key['Key'])

Solution 3:

I'm assuming you have configured authentication separately.

import boto3
s3 = boto3.resource('s3')

my_bucket = s3.Bucket('bucket_name')

for file in my_bucket.objects.all():
    print(file.key)