Starting with a DataFrame that has a form such as this df = pl.DataFrame([{"SkuId":1}]) shape: (1, 1) ┌───────┐ │ SkuId │ │ --- │ │ i64 │ ╞═══════╡ │ 1 │ └───────┘ How can I write it to a JSON file with this format? "SkuId": {"source": 1}, Continue reading...