The AWS hosted Getting Started with the AWS SDK for Python (Boto) page instructs the user to run pip install boto, which installs boto-2.43.0-py2.py3-none-any.whl under OSX 10.11.6:

Next, when the user runs the sample code, the following error is returned:
$ python s3_sample.py
Traceback (most recent call last):
File "s3_sample.py", line 16, in <module>
import boto3
ImportError: No module named boto3
The README file in this project correctly instructs the user to run pip install boto3.