polars.internals.expr.ExprStringNameSpace.concat¶
- ExprStringNameSpace.concat(delimiter: str = '-') polars.internals.expr.Expr¶
Vertically concat the values in the Series to a single string value.
- Returns
- Series of dtype Utf8
Examples
>>> df = pl.DataFrame({"foo": [1, None, 2]}) >>> df = df.select(pl.col("foo").str.concat("-")) >>> df shape: (1, 1) ┌──────────┐ │ foo │ │ --- │ │ str │ ╞══════════╡ │ 1-null-2 │ └──────────┘