Python type hints

PEP 484 and PEP 526 introduced the concept of “type hints” which allow Python code to have inline type declarations to make it easier for editors and static analysis tools to work with Python code.

def add(a: int, b: int) -> int:
    return a + b

To maintain Python 2.7 compatibility, we’d have to use the comment-based syntax:

def add(a, b):
    # type: (int, int) -> int
    return a + b

Is this something that might be worthwhile for us to implement?

[jdufresne]

Python type hints have since been added and are being improved upon. Perhaps it is okay to close this?

[jacopofar]

I see, the library supports Python 2 as well and so the parameter type has to be more flexible. Considering also the problem of the argument changing name, I think the added value of type hinting in this case is not worth it