Function date_ranges 

pub fn date_ranges(
    start: Option<Expr>,
    end: Option<Expr>,
    interval: Option<Duration>,
    num_samples: Option<Expr>,
    closed: ClosedWindow,
) -> Result<Expr, PolarsError>

Available on crate feature lazy only.

Create a column of date ranges from start, end, interval, and num_samples expressions.