Rust simple CSV processing from a CV file, using csv crate

csv_demo.rs

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

fn cities() -> Result<(), Box<dyn Error>> {
    let mut csv_rdr = csv::Reader::from_path("data/cities.csv")?;
    for result in csv_rdr.records() {
        let record = result?;
        println!("{:?}", record);
        println!("{}",record.get(0).unwrap());
    }
    Ok(())
}

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

Output

StringRecord(["Tokyo", "Kantō", "Japan", "37339000"])
Tokyo
StringRecord(["Delhi", "National Capital Territory", "India", "29341000"])
Delhi
StringRecord(["Shanghai", "Huadong", "China", "26446000"])
Shanghai
StringRecord(["São Paulo", "Southeast", "Brazil", "12325000"])
São Paulo
...