Set label field via Jira-Python library or REST API

[ABCD]

Hi,

I need to set the label field of few Jira tickets via jira-python binding
However so far I had no luck achieving this.

This is what I've tried so far.
==============================
As per the below link and few other forum posts, Ive tried to update the labels feils of few of the jira issues via Jira python library.
https://community.atlassian.com/t5/Jira-questions/How-to-update-labels-for-the-issues-present-in-Jql-query-Filter/qaq-p/265116

However I was constantly receiving the following errors

When using this method 

 issue.update(labels=['SentToMaintainer'])

response text = {"errorMessages":["Can not instantiate value of type [simple type, class com.atlassian.jira.rest.api.issue.FieldOperation] from JSON String; no single-String constructor/factory method (through reference chain: com.atlassian.jira.rest.v2.issue.IssueUpdateBean[\"update\"])"]}

When using the second method 
----------------------------
 issue.update(fields={"labels": ['SentToMaintainer']})

response text = {"errorMessages":[],"errors":{"labels":"Field 'labels' cannot be set. It is not on the appropriate screen, or unknown."}}

I also tried to directly changing the field with no luck (no error but it doesnt show up correctly in the webpage)
 issue.fields.labels = ['sentomaintainer']
 >>> issue.fields.labels
 ['sentomaintainer']

https://community.atlassian.com/t5/Jira-questions/Problem-trying-to-add-label-using-cURL/qaq-p/255420

As per this issue, I checked my credentials and when done manually I can change the label field. so that should not be the case

Any help is much appreciated

Thanks
ABCD

[tomd]

Hello,

What Jira version are you using?

Tom

[ABCD]

Hi Tomasz 

Thanks much for the reply. The version im using is v6.4.14#64029-sha1:ae256fe.

I understand this error is logical given that the  CF im trying to stipulate is actually in another screen. But is there a way to switch to a different screen through REST ? 

For example if i do it manually Id click Resolve -> (new popup window comes) then select the label value there and push to to resolved .

So the actual question is how do i do that through REST if its possible

Thanks heaps and apologies for the late reply as I was travelling during this period

Cheeers

ABCD