boto3 Help Needed

[gw1500se]

I'm just getting started with boto3 and AWS. I found this article and tried the sample code. I don't know if the sample code is wrong or if I need to be looking at something else. The bottom line is that the 'for' loop outputs nothing and I do not get any errors. Apparently 's3.buckets.all()' returns nothing. Is there a better, more accurate tutorial for getting started with boto3? TIA.

import boto3

s3 = boto3.resource('s3')

for bucket in s3.buckets.all():
    print(bucket.name)