Here's an example of how the behaviour between Rust and Python differ because of scoping: in Rust: fn main() { let a = 3; let f = | | { a }; let

Here's an example of how the behaviour between Rust and Python differ because of scoping: in Rust: fn main() { let a = 3; let f = | | { a }; let a = "b"; println!("{}, {}", f(), a); } in Python: a = 3 def f (): return a a = "b" print("{}, {}".format(f(), a)) The rust code outputs "3, b" while the python code outputs "b, b". The python code _assigns_ to the variable a, whereas the rust code creates a new scope and redefines a, shadowing it in the parent scope.