Python 3.8 breaks datetime test

[konstin]

From the travis ci build log:

=================================== FAILURES ===================================
___________________________ test_date_from_timestamp ___________________________
    @given(d=dates())
>   def test_date_from_timestamp(d):
tests/test_datetime.py:84: 
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 
d = datetime.date(2000, 1, 1)
    @given(d=dates())
    def test_date_from_timestamp(d):
        ts = get_timestamp(pdt.datetime.combine(d, pdt.time(0)))
>       assert rdt.date_from_timestamp(int(ts)) == pdt.date.fromtimestamp(ts)
E       TypeError: an integer is required (got type tuple)
tests/test_datetime.py:86: TypeError
---------------------------------- Hypothesis ----------------------------------
Falsifying example: test_date_from_timestamp(d=datetime.date(2000, 1, 1))
================ 1 failed, 55 passed, 4 xfailed in 0.94 seconds ================
ERROR: InvocationError for command '/home/travis/build/PyO3/pyo3/examples/rustapi_module/.tox/py/bin/pytest' (exited with code 1)

I didn't check whether this is a bug in the alpha or a breaking change.

[pganssle]

Hm, I can't tell which part is raising the error here. Is it date_from_timestamp? ts is not a tuple, I'm getting a float on 3.8.0a1+.

[pganssle]

OK, this is definitely the date_from_timestamp function. There should not have been a breaking change in this, I suspect it has something to do with the fact that this function was converted over to using the argument clinic between 3.7 and 3.8, which may have accidentally broken the API.

[pganssle]

I've filed issue 36025 for this on the Python tracker, along with the PR python/cpython#11922, which should fix it.

We can either let it continue failing for a while or add in a conditional skip until the next alpha release.

[konstin]

Wow thanks for fixing that in python!

We can just lets this fail for now, it's an allowed_failure on travis anyway.

[pganssle]

@konstin OK, the CPython PR has been merged, so master should work now. Alpha 4 is scheduled for I think tomorrow, so depending on what "3.8-dev" pulls in, I assume this should be fixed in the next few days.

[konstin]

We'll likely have to wait a bit longer for travis ci, but other that sounds great!

[pganssle]

@konstin Looks like it's fixed on Travis!

[konstin]

3.8 is still failing but this time it's tox and toml