polars.LazyFrame.write_json#

LazyFrame.write_json(file: None = None) → str[source]#

LazyFrame.write_json(file: IOBase | str | Path) → None

Serialize the logical plan of this LazyFrame to a file or string in JSON format.

Deprecated since version 0.18.12: This method has been renamed to LazyFrame.serialize().

Parameters:

file: File path to which the result should be written. If set to None (default), the output is returned as a string instead.