match_expr.py

def match_value(number: int) -> str:
    three = 3
    match number:
        case 1:
            return "Yay you are number wan"
        case 2:
            return "Second mouse gets the cheese"
        case three:
            return "You came third"
        case 42:
            return "The answer to life, the universe, and everything"
        case _:
            return "You are too late"

print(match_value(3))

match_expr.rs

#[allow(unreachable_patterns,unused_variables)]
fn main() {
    fn match_value(number: i64) -> String {
        let three = 3;
        match number {
            1 => "Yay you are number wan",
            2 => "Second mouse gets the cheese",
            three => "You came third",
            42 => "The answer to life, the universe, and everything",
            _ => "You are too late",
        }.to_string()
    }
    println!("{}", match_value(3));
}

run_py

$ python3.10 match_expr.py
  File "/tmp/match_expr.py", line 8
    case three:
         ^^^^^
SyntaxError: name capture 'three' makes remaining patterns unreachable

run_rs

$ cargo run
   Compiling match_expr v0.1.0 (/tmp/match_expr)
    Finished dev [unoptimized + debuginfo] target(s) in 0.16s
     Running `target/debug/match_expr`
You came third