The code leverages the Python while loop, Python’s most general loop statement. The built-in input function is used here for general console input, it prints its optional argument string as a prompt, ...

How Python uses type hints (it doesn’t) A key misconception about Python type hints is how they’re used. Python type hints are not used at runtime, at least not ordinarily. In fact, when your ...

This means that regular expressions describing a white list of correct inputs can be used for both (this probably works for Perl, Python and PHP as well but I haven’t checked). In the code for ...