Fix ComputeError

✅ Solution

ComputeError in Polars often arises from operations on empty data structures like empty lists or structs, especially during type casting or when applied to nested structures within `list.eval`. To fix this, ensure your Polars expressions gracefully handle empty data by using `pl.when(pl.len() > 0).then(...)` conditions before performing operations that might fail on empty data or by explicitly casting empty structures to the expected type using `.fill_null(pl.lit(...))` with a suitable default value. This prevents the computation from encountering null values and potentially crashing during execution.