polars.Expr.dt.hours#

Expr.dt.hours() → Expr[source]#

Extract the hours from a Duration type.

Returns:

Expr: Expression of data type Int64.

Examples

>>> from datetime import datetime
>>> df = pl.DataFrame(
...     {
...         "date": pl.date_range(
...             datetime(2020, 1, 1), datetime(2020, 1, 4), "1d", eager=True
...         ),
...     }
... )
>>> df.select(
...     [
...         pl.col("date"),
...         pl.col("date").diff().dt.hours().alias("hours_diff"),
...     ]
... )
shape: (4, 2)
┌─────────────────────┬────────────┐
│ date                ┆ hours_diff │
│ ---                 ┆ ---        │
│ datetime[μs]        ┆ i64        │
╞═════════════════════╪════════════╡
│ 2020-01-01 00:00:00 ┆ null       │
│ 2020-01-02 00:00:00 ┆ 24         │
│ 2020-01-03 00:00:00 ┆ 24         │
│ 2020-01-04 00:00:00 ┆ 24         │
└─────────────────────┴────────────┘