commit	f60e33e9e24ee8faeb1c43cde881cee50bff2ee4	[log] [tgz]
author	James Farrell <[email protected]>	Thu May 09 20:27:34 2024 +0000
committer	Automerger Merge Worker <[email protected]>	Thu May 09 20:27:34 2024 +0000
tree	ed3f0cd6e7f83c520aba5d37e39afc464079caf9
parent	c8d9f9dbe47b47b6ca5c96881776d77fb29f8866 [diff]
parent	fa1e1ba8fa84ad68348fcbef2f68f698f7f4a429 [diff]

tree: ed3f0cd6e7f83c520aba5d37e39afc464079caf9

README.md

csv

A fast and flexible CSV reader and writer for Rust, with support for Serde.

Dual-licensed under MIT or the UNLICENSE.

Documentation

https://docs.rs/csv

If you're new to Rust, the tutorial is a good place to start.

Usage

To bring this crate into your repository, either add csv to your Cargo.toml, or run cargo add csv.

Example

This example shows how to read CSV data from stdin and print each record to stdout.

There are more examples in the cookbook.

use std::{error::Error, io, process};

fn example() -> Result<(), Box<dyn Error>> {
    // Build the CSV reader and iterate over each record.
    let mut rdr = csv::Reader::from_reader(io::stdin());
    for result in rdr.records() {
        // The iterator yields Result<StringRecord, Error>, so we check the
        // error here.
        let record = result?;
        println!("{:?}", record);
    }
    Ok(())
}

fn main() {
    if let Err(err) = example() {
        println!("error running example: {}", err);
        process::exit(1);
    }
}

The above example can be run like so:

$ git clone git://github.com/BurntSushi/rust-csv
$ cd rust-csv
$ cargo run --example cookbook-read-basic < examples/data/smallpop.csv

Example with Serde

This example shows how to read CSV data from stdin into your own custom struct. By default, the member names of the struct are matched with the values in the header record of your CSV data.

use std::{error::Error, io, process};

#[derive(Debug, serde::Deserialize)]
struct Record {
    city: String,
    region: String,
    country: String,
    population: Option<u64>,
}

fn example() -> Result<(), Box<dyn Error>> {
    let mut rdr = csv::Reader::from_reader(io::stdin());
    for result in rdr.deserialize() {
        // Notice that we need to provide a type hint for automatic
        // deserialization.
        let record: Record = result?;
        println!("{:?}", record);
    }
    Ok(())
}

fn main() {
    if let Err(err) = example() {
        println!("error running example: {}", err);
        process::exit(1);
    }
}

The above example can be run like so:

$ git clone git://github.com/BurntSushi/rust-csv
$ cd rust-csv
$ cargo run --example cookbook-read-serde < examples/data/smallpop.csv