str.join

ColExpr.str.join(

delimiter: str = '',

*,

partition_by: Col | ColName | str | Iterable[Col | ColName | str] | None = None,

filter: ColExpr[Bool] | Iterable[ColExpr[Bool]] | None = None,

arrange: ColExpr | Iterable[ColExpr] | None = None,

) → ColExpr[String]

Concatenates all strings in a group to a single string.

Parameters:

delimiter – The string to insert between the elements.