polars.Expr.dt.strftime

Expr.dt.strftime(fmt: str) → Expr

Format Date/Datetime with a formatting rule.

See chrono strftime/strptime.

Examples

>>> from datetime import timedelta, datetime
>>> df = pl.DataFrame(
...     {
...         "date": pl.date_range(
...             datetime(2020, 3, 1), datetime(2020, 5, 1), "1mo"
...         ),
...     }
... )
>>> df.select(
...     [
...         pl.col("date"),
...         pl.col("date")
...         .dt.strftime("%Y/%m/%d %H:%M:%S")
...         .alias("date_formatted"),
...     ]
... )
shape: (3, 2)
┌─────────────────────┬─────────────────────┐
│ date                ┆ date_formatted      │
│ ---                 ┆ ---                 │
│ datetime[μs]        ┆ str                 │
╞═════════════════════╪═════════════════════╡
│ 2020-03-01 00:00:00 ┆ 2020/03/01 00:00:00 │
│ 2020-04-01 00:00:00 ┆ 2020/04/01 00:00:00 │
│ 2020-05-01 00:00:00 ┆ 2020/05/01 00:00:00 │
└─────────────────────┴─────────────────────┘