Hi, Partial document updates can be done using patch - https://learn.microsoft.com/en-us/azure/cosmos-db/sql/create-sql-api-spark?tabs=python#partial-docum.... Also, databricks notebook supports python , could you please reach out to Azure support (cosmos DB) team if they support append through python (which can be run from any python editor (also Databricks notebook, after the Azure Databricks implementation with Cosmos DB endpoint))?