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In [2]:

:timing
:sccache 1
:dep polars = { version = "0.21.1", features = ["lazy", "parquet"] }

In [13]:

use polars::prelude::*;

ChunkedArray¶

Series¶

In [4]:

let s: Series = [10, 20, 30].iter().collect();
s

Out[4]:

shape: (3,)
Series: '' [i32]
[
	10
	20
	30
]

In [5]:

s.len()

Out[5]:

In [6]:

s.get(2)

Out[6]:

Int32(30)

In [15]:

match s.get(2) {
    AnyValue::Int32(x) => x,
    _ => panic!(),
}

Out[15]:

Convert a Series to a ChunkedArray.

In [9]:

{
    let ca = s.i32().unwrap();
    ca
}

Out[9]:

shape: (3,)
ChunkedArray: '' [Int32]
[
	10
	20
	30
]

Get the first element of the ChunkedArray.

In [10]:

{
    let ca = s.i32().unwrap();
    ca.get(0)
}

Out[10]:

Some(10)

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