Boto3 S3 Client Download [better]_fileobj Official

Note: Refer to the Boto3 S3 Client Documentation for detailed parameter specs. 2. Downloading to Memory (BytesIO)

The destination file-like object must be opened in binary mode ( 'wb' ) and implement a write method that accepts bytes. boto3 s3 client download_fileobj

It automatically handles multipart downloads and uses multiple threads to optimize speed for large objects. Note: Refer to the Boto3 S3 Client Documentation

download_file('amzn-s3-demo-bucket', 'OBJECT_NAME', 'FILE_NAME') The download_fileobj method accepts a writeable file-like object. Amazon AWS Documentation download_fileobj - Boto3 1.43.5 documentation Basic Usage Examples 1

By default, it performs parallel range GET requests to improve performance, a feature managed via the TransferConfig object. Basic Usage Examples 1. Downloading to a Local File

import boto3 import io s3 = boto3.client('s3') file_buffer = io.BytesIO() s3.download_fileobj('my-bucket', 'data/config.json', file_buffer) # Seek to the beginning of the buffer to read its content file_buffer.seek(0) print(file_buffer.read().decode('utf-8')) Use code with caution. download_fileobj vs. download_file