Issue with adding a row to workbook table in python using MSGraph API

[dennistran314]

Hi,
I have been trying to use the MS Graph API to add and update rows in an excel file on Sharepoint using MSGraph API. The problem, however, is that I receive the error
AttributeError: 'list' object has no attribute 'serialize'
Eventhough I followed the instructions on https://learn.microsoft.com/en-us/graph/api/table-post-rows?view=graph-rest-1.0&tabs=python
The issue seems to lie in how I defined the values in the request body as it is a list that cannot be serialized. I have tried to make it into a dictionary and a json format using json.dumps() but that didnt work either. My code is as follows:

request_body = WorkbookTableRow(
            values=[
                [1, 2, 3],
                [4, 5, 6]
            ]
        )
        print(request_body)
workbooktableid=tableid.value[0].id
result = await self.user_client.drives.by_drive_id(parent_drive_id).items.by_drive_item_id(src_item_id).workbook.tables.by_workbook_table_id(workbooktableid).rows.post(request_body)
        

If anyone could help me, I would appreciate it :)