APIError (400) with Batch Requests

[imdebourg]

Hello,
I can't seem to figure out how to perform batch requests with the SDK.
Environment: Python 3.11 with msgraph-core==1.1.6 & msgraph-sdk==1.11.0

I checked the samples here but I don't know what I m doing wrong I keep getting an APIError, Code: 400

The code is below

# Create a mock request adapter
request_adapter = graph_client.request_adapter

# Create an instance of BatchRequestBuilder
batch_request_builder = BatchRequestBuilder(request_adapter)

# Create batch request items
#batch_request_content = BatchRequestContentCollection()
batch_request_content = {}
for item in listitems:
    # Remove ID from fields to update
    request_body = FieldValueSet(
        additional_data={k: v for k, v in item.items() if k != 'ID'}
    )

    request = graph_client.sites.by_site_id(env['SITE_ID']).lists.by_list_id(env['PEOPLE_LIST_ID'])\
        .items.by_list_item_id(item['ID']).fields.to_patch_request_information(request_body)

    batch_item = BatchRequestItem(request_information=request)

    #batch_request_content.add_batch_request_item(batch_item)
    batch_request_content[batch_item.id] = batch_item

batch_content = BatchRequestContent(batch_request_content)

for request_id, batch_request_item in batch_content.requests.items():
    print(f"ID: {request_id}")
    print(f"URL: {batch_request_item.url}")
    print(f"Method: {batch_request_item.method}")
    print(f"Headers: {batch_request_item.headers}")
    print(f"Body: {batch_request_item.body}")

#import pdb; pdb.set_trace()

batch_response_content = await graph_client.batch.post(batch_request_content=batch_content)
#batch_response_content = await batch_request_builder.post(batch_request_content=batch_content)

[imdebourg]

@shemogumbe any insight on this?