polars_lazy::dsl

Function lit

Source 
pub fn lit<L>(t: L) -> Expr
where
    L: Literal,
Expand description

Create a Literal Expression from L. A literal expression behaves like a column that contains a single distinct value.

The column is automatically of the “correct” length to make the operations work. Often this is determined by the length of the LazyFrame it is being used with. For instance, lazy_df.with_column(lit(5).alias("five")) creates a new column named “five” that is the length of the Dataframe (at the time collect is called), where every value in the column is 5.