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https://github.com/nomissbowling/iter-tuple
Rust iterator for tuple through proc-macro2 struct Vec AnyValue of polars DataFrame
https://github.com/nomissbowling/iter-tuple
Last synced: about 1 month ago
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Rust iterator for tuple through proc-macro2 struct Vec AnyValue of polars DataFrame
- Host: GitHub
- URL: https://github.com/nomissbowling/iter-tuple
- Owner: nomissbowling
- License: mit
- Created: 2024-07-25T05:14:34.000Z (5 months ago)
- Default Branch: master
- Last Pushed: 2024-08-18T23:10:36.000Z (4 months ago)
- Last Synced: 2024-11-13T16:53:56.552Z (about 1 month ago)
- Language: Rust
- Homepage: https://crates.io/crates/iter-tuple
- Size: 25.4 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
iter-tuple
==========
Rust iterator for tuple through proc-macro2 struct Vec AnyValue of polars DataFrame
How to use
----------
```rust
use iter_tuple::tuple_derive;
use iter_tuple::tuple_sqlite3; // optional (must use with tuple_derive)
use iter_tuple::struct_derive; // optional (must use with tuple_sqlite3)
use polars::prelude::{DataFrame, AnyValue, Schema}; // , Field, DataType
use anyvalue_dataframe::{row_schema, named_schema, to_any};
/// auto defines struct StTpl and sqlite3 trait with struct_derive (optional)
#[struct_derive((id, string), (UInt64, Utf8))]
/// auto defines sqlite3 trait for RecTpl with tuple_sqlite3 (optional)
#[tuple_sqlite3(UInt64, Utf8)]
/// auto defines struct RecTpl with tuple_derive
#[tuple_derive(UInt64, Utf8)]
pub type Tpl<'a> = (u64, &'a str);
pub fn main() {
let rows = [
(0, "a"),
(1, "b"),
(2, "c")
].into_iter().map(|r|
row_schema(RecTpl::into_iter(r).collect())
// row_schema(RecTpl::from(r).into_iter().collect()) // same as above
).collect::>();
let schema = Schema::from(&rows[0]);
let df = DataFrame::from_rows_iter_and_schema(rows.iter(), &schema);
let mut df = df.expect("create DataFrame");
let n = vec!["id", "string"];
df.set_column_names(&n).expect("set column names");
let sc = named_schema(&df, n);
assert_eq!(df.schema(), sc); // OK all
let df = df.select(["string", "id"]).expect("select columns");
println!("{:?}", df.head(Some(100)));
}
```
Sample
------
- [https://crates.io/crates/egui-dataframe-sample](https://crates.io/crates/egui-dataframe-sample)
- [https://github.com/nomissbowling/egui-dataframe-sample](https://github.com/nomissbowling/egui-dataframe-sample)
Requirements
------------
- [https://github.com/pola-rs/polars](https://github.com/pola-rs/polars)
- [polars](https://crates.io/crates/polars)
- [polars-utils](https://crates.io/crates/polars-utils)
Optional
--------
- [https://crates.io/crates/sqlite](https://crates.io/crates/sqlite)
- [https://crates.io/crates/polars-sqlite](https://crates.io/crates/polars-sqlite)
- [https://crates.io/crates/anyvalue-dataframe](https://crates.io/crates/anyvalue-dataframe)
Links
-----
- [https://crates.io/crates/iter-tuple](https://crates.io/crates/iter-tuple)
- [https://github.com/nomissbowling/iter-tuple](https://github.com/nomissbowling/iter-tuple)
License
-------
MIT License