Optional Argument Mishandled

Feb 19, 2024in this guide, we’ll delve into what the optional type is, why it matters, and how to effectively use it in python, complete with examples. The optional type is a way to denote that a. In line with other type-hinted languages, the preferred (and more concise) way to denote an optional argument in python 3.10 and up, is now type | none, e.g.

May 3, 2025use optional for values that can be none, and define types for collections like lists and tuples. Oct 4, 2021optional was invented to indicate "type or none". As mentioned in the above comments, optional[str] is a type-hint to be used by ides and other static analysis tools, not a default argument.

If you want to make a default argument such that you can call. Jan 16, 2024python lets you write optional type hints where you can return either a specified type or none. Using optional[str] instead of just str will let the editor help you detect errors where you could be assuming that a value is always a str, when it could actually be none too.

Python typing is a feature that lets you add optional static typing to your code. Jan 20, 2025the optional type in python is a powerful tool for handling values that might be absent.