https://doc.rust-lang.org/std/collections/struct.HashMap.htm... https://doc.rust-lang.org/std/collections/struct.BTreeMap.ht...

    use std::iter::FromIterator;
    BTreeMap::from_iter(hash_map.into_iter())

  for (k,v) in &src
    { dst.insert(k,v); }

?

That being said the point still stands, I remember specifically feeling it at the lack of included regex. I overall prefer the slim std lib of rust over the massive python though. Especially with the community being pretty good about nominating de facto standard packages like for regex.

https://doc.rust-lang.org/std/collections/struct.HashMap.htm...

I didn't know it was included in stdlib (I really thought it wasn't) and feel idiotic now. It is still odd (having a primarily scripting background and not coming from the systems side) that I have to include what seems to be essentially an import statement at the top. I guess it is a lot more efficient that way though. Thanks for pointing out my error!