How to update an issue without user notification?

[giumas]

I cannot find in the documentation how to update an issue without triggering user notification.

The only place where this feature is mentioned is as a parameter here: https://github.com/atlassian-api/atlassian-python-api/blob/master/atlassian/jira.py#L922

Two questions:

1. Is it possible to disable the user notification for all the other API calls modifying an issue?
2. Where can I find an example on how to use edit_issue(self, issue_id_or_key, fields, notify_users=True) (https://github.com/atlassian-api/atlassian-python-api/blob/master/atlassian/jira.py#L922)? Can I pass a dictionary (fields={'labels': ['test']}) or do I need to convert it into a JSON string?

Many thanks!