Schemas.left_only

Schemas.left_only() → Schema

Columns that are only present in the left data frame, mapped to their data types.

Examples

>>> import polars as pl
>>> from diffly import compare_frames
>>> left = pl.DataFrame({"id": [1], "value": [10.0]})
>>> right = pl.DataFrame({"id": [1], "score": [100]})
>>> compare_frames(left, right, primary_key="id").schemas.left_only()
{'value': Float64}