How to download the latest file of an S3 bucket using Boto3?

Question

The other questions I could find were refering to an older version of Boto. I would like to download the latest file of an S3 bucket. In the documentation I found that there

Answer 1

I also wanted to download latest file from s3 bucket but located in a specific folder. Use following function to get latest filename using bucket name and prefix (which is folder name).

import boto3

def get_latest_file_name(bucket_name,prefix):
    """
    Return the latest file name in an S3 bucket folder.

    :param bucket: Name of the S3 bucket.
    :param prefix: Only fetch keys that start with this prefix (folder  name).
    """
    s3_client = boto3.client('s3')
    objs = s3_client.list_objects_v2(Bucket=bucket_name)['Contents']
    shortlisted_files = dict()            
    for obj in objs:
        key = obj['Key']
        timestamp = obj['LastModified']
        # if key starts with folder name retrieve that key
        if key.startswith(prefix):              
            # Adding a new key value pair
            shortlisted_files.update( {key : timestamp} )   
    latest_filename = max(shortlisted_files, key=shortlisted_files.get)
    return latest_filename

latest_filename = get_latest_file_name(bucket_name='use_your_bucket_name',prefix = 'folder_name/')