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  * polars.LazyF... 

#  polars.LazyFrame.serialize  #

LazyFrame.  serialize  (  _ file  :  IOBase  |  [ str  ](https://docs.python.org/3/library/stdtypes.html#str "\(in Python v3.12\)") |  Path  |  [ None  ](https://docs.python.org/3/library/constants.html#None "\(in Python v3.12\)") =  None  _ )  →  [ str  ](https://docs.python.org/3/library/stdtypes.html#str "\(in Python v3.12\)") |  [ None  ](https://docs.python.org/3/library/constants.html#None "\(in Python v3.12\)") [ [source]  ](https://github.com/pola-rs/polars/blob/main/py-polars/polars/lazyframe/frame.py#L556-L607) # 
    

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

Parameters  :

    

**file**

    

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

See also

[ ` LazyFrame.deserialize  `
](polars.LazyFrame.deserialize.html#polars.LazyFrame.deserialize
"polars.LazyFrame.deserialize")

    

Examples

Serialize the logical plan into a JSON string.

    
    
    >>> lf = pl.LazyFrame({"a": [1, 2, 3]}).sum()
    >>> json = lf.serialize()
    >>> json
    '{"MapFunction":{"input":{"DataFrameScan":{"df":{"columns":[{"name":"a","datatype":"Int64","b