Blob storage copy completion time is None

[hector-sab]

• Package Name: azure-storage-blob
• Package Version: 12.19.0
• Operating System: Linux
• Python Version: 3.11.5

Describe the bug
When requesting the blob properties through the python sdk, the completion time of the copy information of the blob is unavailable through the CopyProperties.

To Reproduce
Steps to reproduce the behavior:

1. Create a Storage Account in Azure
2. Create a Contanier
3. Upload whatever file you want to it
4. Run the code below and chech the properties.copy.completion_time

from azure import identity
from azure.storage import blob

credential = identity.DefaultAzureCredential()
container = 'mycontainer'
account_url = "https://myaccount.blob.core.windows.net/"
bsc = blob.BlobServiceClient(
    account_url=account_url,
    credential=credential,
)
container_client = bsc.get_container_client(container)

path = 'myfile.txt'
blob_client = container_client.get_blob_client(path)
properties = blob_client.get_blob_properties()

print(properties.copy.completion_time)  # This will show nothing as it is None

Expected behavior
The copy information contains the completion time of the copy.

Screenshots
In the srceenshot you can see the initialization of the CopyProperties dataclass and that kwargs.get('x-ms-copy-completion_time') returns nothing, but kwargs.get('x-ms-copy-completion-time') returns a datetime object

Additional context
I created this PR that fixes it. It is a really simple fix. #34500

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @xgithubtriage.

[vincenttran-msft]

Hi @hector-sab Héctor, thanks for your inquiry! This does seem like it is simply a typo (using _ where it should be a -). I can take your pull-request fix as you have correctly identified the root cause, but I will leave some guidance on what is missing from the pull-request in the PR comments 😄
Thanks!