Create aws credentials file in below bath

~/.aws/config 

Setup virtual environment as below & install required dependencies

python3.6 -m venv venv
pip install -r requirements.txt

Execute the code as below example to download multiple files in parallel

python downloader.py http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-1603.qcow2.xz http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-1503.qcow2.xz http://cloud.centos.org/centos/7/images/CentOS-7-x86_64-GenericCloud-1605.qcow2.xz s3://glovo-public/systems-engineer-interview-1.0-SNAPSHOT.jar

Steps to add a new protocol like s3 or http

Add a new function to support the download based on the protocol add the function to the dictionary value in the given code downloader.py