Boto3 Multipart upload

README.md

total_bytes = os.stat('path/to/file').st_size
PROGRESS_BYTES = 0
def upload_callback(bytes, progress_bytes=PROGRESS_BYTES):
  progress_bytes += bytes
  sys.stdout.write('\r')
  sys.stdout.write('part uploaded: %d of %d bytes' % (progress_bytes, total_bytes))
  sys.stdout.flush()

with open(output_file, 'rb') as ouput_data:
  s3.upload_fileobj(ouput_data, s3_bucket, s3_key, Callback=upload_callback)