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  * [ __ ](../../../index.html)
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  * __
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  * polars.LazyF... 

#  polars.LazyFrame.unnest  #

LazyFrame.  unnest  (

     _ columns  :  ColumnNameOrSelector  |  Collection  [  ColumnNameOrSelector  ]  _ , 
     _ *  more_columns  :  ColumnNameOrSelector  _ , 
)  →  Self  [ [source]  ](https://github.com/pola-rs/polars/blob/main/py-
polars/polars/lazyframe/frame.py#L5748-L5800) #

    

Decompose struct columns into separate columns for each of their fields.

The new columns will be inserted into the DataFrame at the location of the
struct column.

Parameters  :

    

**columns**

    

Name of the struct column(s) that should be unnested.

***more_columns**

    

Additional columns to unnest, specified as positional arguments.

Examples

    
    
    >>> df = pl.LazyFrame(
    ...     {
    ...         "before": ["foo", "bar"],
    ...         "t_a": [1, 2],
    ...         "t_b": ["a", "b"],
    ...         "t_c": [True, None],
    ...         "t_d": [[1, 2], [3]],
    ...         "after": ["baz", "womp"],
    ...     }
    ... ).select("before", pl.struct(pl.col("^t_.$")).alias("t_struct"), "after")
    >>> df.collect()
    shape: (2, 3)
    ┌────────┬─────────────────────┬───────┐
    │ before ┆ t_struct            ┆ after │
    │ ---    ┆