hi
you can use Photoshop and paint tool for resizing your photo
Thanks
AINJ IT SERVICES PVT LTD
www.ainj.in

so you could try something like this like mariogonzalez said. this will pull from one bucket and resize them locally, and upload them to another bucket, renaming it in the process. If you want to convert the images to a few dimensions, you can just expand the script to do so.

hth

#!/usr/bin/python3
# -*- coding: utf-8 -*-
import boto3
import os
import subprocess
import time

session = boto3.session.Session()
####################################################################
client = session.client('s3',
                        region_name='sfo2',
                        endpoint_url='https://sfo2.digitaloceanspaces.com',
                        aws_access_key_id='32gfeGRITgtfrYOURKEYIDGTRHtrh45gdHG',
                        aws_secret_access_key='FwrTUCDbQG8/QMbYOUACCESSKEYRwZg3etrHtrjrJTRuREnl84')
bucket1 = ("sourcebucket")  #the bucket holding original images
bucket2 = ("emptybucket")  #an empty bucket you can send the converted images to
workdirectory = ("/home/username/pics/")
resizeDimension = ("512x512")
####################################################################

uploaded = []
filelist = []
failed = []
#os.mkdir(workdirectory)

def GetNames(s3, **base_kwargs):  #gets the list of images in the bucket
    continuation_token = None
    while True:
        list_kwargs = dict(MaxKeys=1000, **base_kwargs)
        if continuation_token:
            list_kwargs['Marker'] = continuation_token
        response = client.list_objects(**list_kwargs)
        yield from response.get('Contents', [])
        time.sleep(1)
        if not response.get('IsTruncated'):  # At the end of the list?
            break
        else:
            continuation_token = response.get('NextMarker')

def convert(filename):
    try:
        print("CV",filename)
        subprocess.run('convert ' + workdirectory + filename+'[0]' +' -resize ' + resizeDimension +" "+ workdirectory + resizeDimension + filename, shell=True)
    except Exception as e:
        failed.append(filename)

def uploadImage(filename):
    if os.path.exists(workdirectory+resizeDimension+filename):
        try:
            print("UPLOADING :",resizeDimension+filename)

            client.upload_file(workdirectory+resizeDimension+filename,  # Path to local file
                                bucket2,  # Name of Space
                                resizeDimension+filename)
        except Exception as e:
            print(e)
            s = str(e)
            return False
        return True

try:
    for file in GetNames(client, Bucket=bucket1):
        filelist.append(file['Key'])
        print("DL",file['Key'])
        try:
            with open(workdirectory+file['Key'], 'wb') as f:
                client.download_fileobj(bucket1, file['Key'], f)
                convert(file['Key'])
        except Exception as e:
            s = str(e)
            print(e)

except Exception as e:
    s = str(e)
    print(e)


for x in filelist:
    try:
        uploadImage(x)
    except Exception as e:
        s = str(e)
        print(e)