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What I don't understand is why it's not:

    def greeting(name: str): str:

or:

    def greeting(name: str): str

Using once ":" and then "->" for type declaration is inconsistent. Not to mention that the dash is not always aligned with the tip of the ">" and it looks ugly, not like a real arrow!

1 comments

The name: implies that the type of the "name" object is str. If you were consistent, then, def greeting(...):str would imply that the type of the greeting object is str, which is definitely not the case (it is "function"). The -> isn't defining the type, it's specifying what is returned.

But it's not the name alone, it's the name with the signature. `greeting` might be `function`, but `greeting("nikolay")` type would be `str`.