atlassian-python - can't set mandatory field when closing issue

[Bertrand Delaitre]

Using atlassian-python library, I'm trying to change the status of an issue from one status to "Closed".

In the "Close" transition screen, the Resolution field is mandatory. So under Jira, when I want to close a ticket I've to fill Resolution field. It's possible because the field is in the transition screen.

Using the python library, I'm using set_issue_status to change the status to Closed with Resolution field defined. It doesn't work. 

Here is my code

jira.set_issue_status(issue_key="SAIUSR-59",
                      status_name="Closed",
                      fields={'Resolution': {'name': 'Fixed'}},
                      update={"comment": [{"add": {"body": "Mis à jour par Python"}}]})

Here is the answer : 

"requests.exceptions.HTTPError: Resolution: Field 'Resolution' cannot be set. It is not on the appropriate screen, or unknown."

If I remove the "fields" parameter, then I get:

requests.exceptions.HTTPError: resolution: Resolution is required.

Any help is welcome.

[Bertrand Delaitre · Accepted solution]

I have to use "resolution" instead of "Resolution". That is.