polars.Series.str.starts_with# Series.str.starts_with(sub: str | Expr) → Series[source]# Check if string values start with a substring. Parameters: subPrefix substring. See also containsCheck if string contains a substring that matches a regex. ends_withCheck if string values end with a substring. Examples >>> s = pl.Series("fruits", ["apple", "mango", None]) >>> s.str.starts_with("app") shape: (3,) Series: 'fruits' [bool] [ true false null ]