Function from_musicxml 

pub fn from_musicxml(document: &str) -> Result<Stream>

Available on crate feature musicxml only.

Reads a MusicXML document – the text of a .musicxml file, or of the score inside a compressed .mxl – into a score: music21’s converter.parse for the format.

use music21_rs::musicxml::from_musicxml;

let score = from_musicxml(
    "<score-partwise><part-list><score-part id=\"P1\"><part-name>Flute</part-name>\
     </score-part></part-list><part id=\"P1\"><measure number=\"1\">\
     <attributes><divisions>1</divisions></attributes>\
     <note><pitch><step>C</step><octave>4</octave></pitch><duration>4</duration>\
     <type>whole</type></note></measure></part></score-partwise>",
)?;
let part = score.parts()[0];
assert_eq!(part.name(), Some("Flute"));
assert_eq!(part.measures()[0].pitches()[0].name_with_octave(), "C4");