polars.DataFrame.deserialize#

classmethod DataFrame.deserialize(source: str | Path | IOBase) → Self[source]#

Read a serialized DataFrame from a file.

New in version 0.20.31.

Parameters:

source: Path to a file or a file-like object (by file-like object, we refer to objects that have a read() method, such as a file handler (e.g. via builtin open function) or BytesIO).

See also

DataFrame.serialize

Examples

>>> import io
>>> df = pl.DataFrame({"a": [1, 2, 3], "b": [4.0, 5.0, 6.0]})
>>> json = df.serialize()
>>> pl.DataFrame.deserialize(io.StringIO(json))
shape: (3, 2)
┌─────┬─────┐
│ a   ┆ b   │
│ --- ┆ --- │
│ i64 ┆ f64 │
╞═════╪═════╡
│ 1   ┆ 4.0 │
│ 2   ┆ 5.0 │
│ 3   ┆ 6.0 │
└─────┴─────┘