Rust can check for type error when compiling, which is helpful on development.<p>The runtime exception is unavoidable when using unwrap() but it's reasonable since not all kind of errors can be eliminated statically.<p>However I suppose most python don't prefer to deal with (complex/generic) type system.<p>My general feeling on python developers is they prioritize "speed of development" more than "speed of execution".<p>Some people even call them data scientist instead of programmer to highlight their focus is not on the programming aspect.