`pl.Expr.list.get` raises error on null values.

[dalejung]

`pl.Expr.list.get` raises error on null values.

[lscheilling]

Wouldn't this error be related to the new null_on_oob parameter in pl.Expr.list.get?

Source Code

[mcrumiller]

I don't think that null values should raise on oob even when the parameter is True. If it did, the parameter would only be useful when dealing with series without nulls, otherwise it must be set to False. If not, all calls will fail as long as a single null value is present.

[mcrumiller]

Also, note that this is not the case for arrays:

s = pl.Series([None, [1]], dtype=pl.Array(pl.Int32, 1))
s.arr.get(0, null_on_oob=False)  # returns [null, 1]
s.arr.get(0, null_on_oob=True)   # returns [null, 1]

[stinodego]

Thanks for the report. This is most probably a side-effect of #16841

[stinodego]

Re-opening as this wasn't fixed completely - see #17276