get_file_from_s3.py

"""
Will need to install boto3: pip install boto3
"""

import os 
import boto3 

# variables come from AWS Management Console
os.environ['AWS_ACCESS_KEY_ID'] = 'YOUR_ACCESS_KEY'
os.environ['AWS_SECRET_ACCESS_KEY'] = 'YOUR_SECRET_KEY'

#create s3 client with boto3 package
s3 = boto3.client('s3')

#specify the bucket where file lives and the name of the file
bucket_name = 'your-bucket-name' 
file_key = 'path/to/your/file'

#use the download_file() method of the S3 client to download the file to your local machine
#The ‘/path/to/local/file’ variable specifies where on your local machine you would want to save the file 
s3.download_file(bucket_name, file_key, '/path/to/local/file')


"""
Alternatively, you can use the boto3.resource() method to create a boto3 resource and 
download file using download_file method on the resource
"""
s3 = boto3.resource('s3') 
s3.Bucket(bucket_name).download_file(file_key, '/path/to/local/file')