Python vs. Rust

Many features of the Rust language will be familiar to Python programmers. Many examples are listed below. For more code comparisons, see py2rs.

Concept

Python

Rust

tuples

my_tuple = (1, 2, 3)
# Access the element at index 1
n = my_tuple[1]

let my_tuple = (1, 2, 3);
// Access the element at index 1
let n = my_tuple.1;

destructuring

(x, y, z) = my_tuple

let (x, y, z) = my_tuple;

"don't care" / wildcard

(a, _, b) = my_tuple

let (a, _, b) = my_tuple;

lambdas / closures

# Lambdas are anonymous functions
f = lambda x: x * x
f(4)

// Closures are anonymous functions
let f = | x | x * x;
f(4)

type annotations

x: int = 42

let x: i32 = 42;

ranges

range(0, 10)

0..10

match-case / match blocks

match x:
    case 1:
        ...
    case _:
        ...

match x {
    1 => { ... },
    _ => { ... }
}

for-in loops

for i in range(0, 10):
    ...

for i in 0..10 {
    ...
}

If-else conditionals

if x > 10:
    ...
else:
    ...

if x > 10 {
    ...
} else {
    ...
}

While loops

while x < 10:
    ...

while x < 10 {
    ...
}

Importing modules

import math

use std::f64::consts::PI;

String formatting

"Hello, {}".format(name)

format!("Hello, {}", name)

List/Vector creation

lst = [1, 2, 3]

let lst = vec![1, 2, 3];

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