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  * __
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  * polars.LazyF... 

#  polars.LazyFrame.gather_every  #

LazyFrame.  gather_every  (  _ n  :  [ int
](https://docs.python.org/3/library/functions.html#int "\(in Python v3.12\)")
_ , _ offset  :  [ int  ](https://docs.python.org/3/library/functions.html#int
"\(in Python v3.12\)") =  0  _ )  →  Self  [ [source]
](https://github.com/pola-rs/polars/blob/main/py-
polars/polars/lazyframe/frame.py#L4858-L4898) #

    

Take every nth row in the LazyFrame and return as a new LazyFrame.

Parameters  :

    

**n**

    

Gather every _n_ -th row.

**offset**

    

Starting index.

Examples

    
    
    >>> lf = pl.LazyFrame(
    ...     {
    ...         "a": [1, 2, 3, 4],
    ...         "b": [5, 6, 7, 8],
    ...     }
    ... )
    >>> lf.gather_every(2).collect()
    shape: (2, 2)
    ┌─────┬─────┐
    │ a   ┆ b   │
    │ --- ┆ --- │
    │ i64 ┆ i64 │
    ╞═════╪═════╡
    │ 1   ┆ 5   │
    │ 3   ┆ 7   │
    └─────┴─────┘
    >>> lf.gather_every(2, offset=1).collect()
    shape: (2, 2)
    ┌─────┬─────┐
    │ a   ┆ b   │
    │ --- ┆ --- │
    │ i64 ┆ i64 │
    ╞═════╪═════╡
    │ 2   ┆ 6   │
    │ 4   ┆ 8   │
    └─────┴─────┘
    

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