docs/examples/storage/s3/multipart_large_file_upload.py

from libcloud.storage.types import Provider
from libcloud.storage.providers import get_driver

# Path to a very large file you want to upload
FILE_PATH = "/home/user/myfile.tar.gz"

cls = get_driver(Provider.S3)
driver = cls("api key", "api secret key")

container = driver.get_container(container_name="my-backups-12345")

# This method blocks until all the parts have been uploaded.
extra = {"content_type": "application/octet-stream"}

with open(FILE_PATH, "rb") as iterator:
    obj = driver.upload_object_via_stream(
        iterator=iterator, container=container, object_name="backup.tar.gz", extra=extra
    )