polars.Expr.hash#
- Expr.hash( ) Expr [source]#
Hash the elements in the selection.
The hash value is of type
UInt64
.- Parameters:
- seed
Random seed parameter. Defaults to 0.
- seed_1
Random seed parameter. Defaults to
seed
if not set.- seed_2
Random seed parameter. Defaults to
seed
if not set.- seed_3
Random seed parameter. Defaults to
seed
if not set.
Notes
This implementation of
hash
does not guarantee stable results across different Polars versions. Its stability is only guaranteed within a single version.Examples
>>> df = pl.DataFrame( ... { ... "a": [1, 2, None], ... "b": ["x", None, "z"], ... } ... ) >>> df.with_columns(pl.all().hash(10, 20, 30, 40)) shape: (3, 2) ┌──────────────────────┬──────────────────────┐ │ a ┆ b │ │ --- ┆ --- │ │ u64 ┆ u64 │ ╞══════════════════════╪══════════════════════╡ │ 9774092659964970114 ┆ 13614470193936745724 │ │ 1101441246220388612 ┆ 11638928888656214026 │ │ 11638928888656214026 ┆ 13382926553367784577 │ └──────────────────────┴──────────────────────┘