Function lines 

pub fn lines(child: &mut Child) -> Lines

creates a new Lines instance

use std::process::{Command, Stdio};
 match Command::new("...")
     .stdout(Stdio::piped())
     .stderr(Stdio::piped()).spawn() {
         Ok(mut child) => {
             let lines = pine::lines(&mut child);
             child.wait().unwrap();
             for l in lines.iter() {
                 println!("{:?}", l)
             }
         },
        _ => println!("failed to launch process")
    }