Version 0.21.0

Multi-index columns support

We continue improving multi-index columns support. We made the following APIs support multi-index columns:

Documentation

Now, we have installation guide, design principles and FAQ in our public documentation (#914, #944, #963, #964)

Other new features and improvements

We added the following new features:

koalas

koalas.DataFrame:

koalas.Series:

koalas.Index:

koalas.MultiIndex:

koalas.Expanding

Along with the following improvements:

  • Fix passing options as keyword arguments (#968)

  • Make is_monotonic~ work properly for index (#930)

  • Fix Series.__getitem__ to work properly (#934)

  • Fix reindex when all the given columns are included the existing columns (#975)

  • Add datetime as the equivalent python type to TimestampType (#957)

  • Fix is_unique to respect the current Spark column (#981)

  • Fix bug when assign None to name as Index (#974)

  • Use name_like_string instead of str directly. (#942, #950)