Extract very large zip file on AWS S3 using Lamda Functions

I'm trying to read a very large zip file on a s3 bucket and extract its data on another s3 bucket using the code below as lambda function:

import jsonimport boto3from io import BytesIOimport zipfiledef lambda_handler(event, context):    s3_resource = boto3.resource('s3')    source_bucket = 'bucket1'    target_bucket = 'bucket2'    for file in my_bucket.objects.all():        if (str(file.key).endswith('.zip')):            zip_obj = s3_resource.Object(bucket_name=source_bucket, key=file.key)            buffer = BytesIO(zip_obj.get()["Body"].read())            z = zipfile.ZipFile(buffer)            for filename in z.namelist():                file_info = z.getinfo(filename)                try:                    response = s3_resource.meta.client.upload_fileobj(                        z.open(filename),                        Bucket=target_bucket,                        Key=f'{filename}'                        )                except Exception as e:                    print(e)        else:            print(file.key +' is not a zip file.')

Now, the problem is this code reads the whole file into memory and I'm getting MemoryError.

I want to know if there is any more efficient way to dot this? like read the file in chunks?

Thanks.