Rest...expr: ExprOrString[]> df = pl.DataFrame({
... "a": ["a", "b", "c"],
... "b": [1, 2, 3],
... })
> df.select(
... pl.format("foo_{}_bar_{}", pl.col("a"), "b").alias("fmt"),
... )
shape: (3, 1)
┌─────────────┐
│ fmt │
│ --- │
│ str │
╞═════════════╡
│ foo_a_bar_1 │
├╌╌╌╌╌╌╌╌╌╌╌╌╌┤
│ foo_b_bar_2 │
├╌╌╌╌╌╌╌╌╌╌╌╌╌┤
│ foo_c_bar_3 │
└─────────────┘
// You can use format as tag function as well
> pl.format("foo_{}_bar_{}", pl.col("a"), "b") // is the same as
> pl.format`foo_${pl.col("a")}_bar_${"b"}`
String format utility for expressions Note: strings will be interpolated as
col(<value>). if you want a literal string, uselit(<value>)