polars-rows-iter 0.2.0

Library for easy and convenient row iteration of polars dataframes
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46

# polars-rows-iter

This is a **very early state** library for simple and convenient row iteration of polars dataframes.<br>
Currently are only primitive and string types supported.

Todos:
* Unit-Tests
* Documentation 
* DType: DateTime support
* DType: Date support

### Example:
```rust
use polars::prelude::*;
use polars_rows_iter::*;

#[derive(Debug, FromDataFrameRow)]
#[derive(PartialEq)] // for assert_eq
struct MyRow<'a>
{
    #[column("col_a")]
    a: i32,
    // the column name defaults to the field name if no explicit name given
    col_b: &'a str
}

let df = df!(
        "col_a" => [1i32, 2, 3, 4, 5],
        "col_b" => ["a", "b", "c", "d", "e"]
    ).unwrap();

let rows_iter = df.rows_iter::<MyRow>().unwrap();
// unwrap rows and collect to vector for assert_eq
let rows_vec = rows_iter.map(|row|row.unwrap()).collect::<Vec<MyRow>>();

assert_eq!(
    rows_vec,
    [
        MyRow { a: 1, col_b: "a" },
        MyRow { a: 2, col_b: "b" },
        MyRow { a: 3, col_b: "c" },
        MyRow { a: 4, col_b: "d" },
        MyRow { a: 5, col_b: "e" },
    ]
);
```