polars.DataFrame.serialize#

DataFrame.serialize(file: IOBase | str | Path | None = None) → str | None[source]#

Serialize this DataFrame to a file or string in JSON format.

New in version 0.20.31.

Parameters:

file: File path or writable file-like object to which the result will be written. If set to None (default), the output is returned as a string instead.

Examples

>>> df = pl.DataFrame(
...     {
...         "foo": [1, 2, 3],
...         "bar": [6, 7, 8],
...     }
... )
>>> df.serialize()
'{"columns":[{"name":"foo","datatype":"Int64","bit_settings":"","values":[1,2,3]},{"name":"bar","datatype":"Int64","bit_settings":"","values":[6,7,8]}]}'