Support for typing.Iterator and better support for typing.Iterable.

[xbanke]

• typical version: 2.0.17
• Python version: 3.7.4
• Operating System:

Description

Iterable can be infinitely.

from typing import Iterable
import typic

def infinite_numbers():
    i = 0
    while 1:
        yield i
        i += 1

@typic.al
def foo(iterable: Iterable[int]):
    print(iterable)

foo(range(5))  # [0, 1, 2, 3, 4]
foo(infinite_numbers())  # never stop

What I Did

Paste the command(s) you ran and the output.
If there was a crash, please include the traceback here.

[seandstewart]

Hey @xbanke -

Thanks for the submission. This is a tricky problem, because an Iterable may be an either an Iterator - which can iterate infinitely, or any iterable object/container.

As of right now, there's no existing support for iterators, so this would need to be added.

I don't think I want to change the default behavior of Iterable, but perhaps some intelligence can be added once iterator support is added to try and detect which path to use based upon the input.