How to update custom field values with drop down options/ multiple options available?

[rithwik_poleneni]

I need to update a custom field in JIRA using Python. I checked other answers and they only provide solution for text fields. But I have a multi value list that I would like to update using Python.

I tried this but it doesn't work.

```
issue.update(fields={'customfield_13090': {'value':'64'}})

AND

issue.update(fields={'customfield_13090': {'value':'Implementation Services'}})
```

I'm getting this error when I run that line

```
jira.exceptions.JIRAError: JiraError HTTP 400 url: https://test.jira.com/rest/api/2/issue/1400908679
text: Can not deserialize instance of java.lang.Long out of START_OBJECT token
at [Source: N/A; line: -1, column: -1]
```

I inspected the list field and found that value 64 is the option value that I need to update if I want the list to have Implementation Services as the selected option.

```
<option selected="selected" value="64">
Implementation Services
</option>
```

Can some one please tell me what is the mistake in my line of code.

[Sajit Nair _Trundl_]

Hello @rithwik_poleneni , Welcome to the community.
before anyone from the community delves into scripting correctness, can you please share your use case ?
"I need to update a custom field in JIRA using Python."

I ask this, to know if there is an easier fix for the problem.

[Thirupathi Edla]

You can try the below
issue.update(fields= {"customfield_1234": [{"value": "abc"}]})