Example for MultipartUpload

[Dave Johansen]

Describe the issue

There doesn't appear to be any documentation for how to use MultipartUpload and it errors out saying that the upload_id doesn't exist when trying to use it.

Here's example code:

from uuid import uuid4

import boto3


s3_resource = boto3.resource("s3")
mpu = resource.MultipartUpload("test_bucket", f"test_mpu.txt", str(uuid4()))
for n in range(4):
    part = mpu.Part(n)
    part.upload(Body=open(f"test_{n}.txt").read())

And here's the error that happens:

NoSuchUpload: An error occurred (NoSuchUpload) when calling the UploadPartCopy operation: The specified upload does not exist. The upload ID may be invalid, or the upload may have been aborted or completed.

Links

https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/s3/multipartupload/index.html

[Ryan F.]

Hi @daveisfera, thanks for reaching out. You're right that the documentation for the resources page is a bit lacking, but fortunately, it's better documented elsewhere. Here's the client MPU operation, and the S3 customization reference. Both of those should be helpful. Please let me know if you have any other questions.

[Dave Johansen]

Those are both using Client rather than Resource and isn't that at least partially deprecated?

[Ryan F.]

Nope! Client is fully supported. Resources aren't deprecated, but they are feature-frozen.

[Dave Johansen]

Doh! I had it backwards and Resource is the one that's no longer being developed

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