[Python] docstring for DuckDBPyRelation.unique() describes different functionality to what it does

[ned2]

The docstring for DuckDBPyRelation.unique() says this: Number of distinct values in a column.

In practice, it looks like it's actually performing a deduplication on the supplied column expression. ie these two relational expressions appear equivalent:

relation.unique("some_column")

relation.select("some_column").distinct()

Perhaps the docstring needs updating?

[ned2]

cc @Tishj

[szarnyasg]

Hi @ned2, sorry, this was on the backlog for quite some time. I PR'd the fix now.