Bug 2058169

python-cftime fails to build with Python 3.11.0a5.

=================================== FAILURES ===================================
________________________ TestDate2index.test_select_nc _________________________

self = <test.test_cftime.TestDate2index testMethod=test_select_nc>

    def test_select_nc(self):
        nutime = self.time_vars['time']
    
        # these are python datetimes ('proleptic_gregorian' calendar).
        dates = [datetime(1950, 1, 2, 6), datetime(
            1950, 1, 3), datetime(1950, 1, 3, 18)]
    
        t = date2index(dates, nutime, select='before')
        assert_equal(t, [1, 2, 2])
    
        t = date2index(dates, nutime, select='after')
        assert_equal(t, [2, 2, 3])
    
        t = date2index(dates, nutime, select='nearest')
        assert_equal(t, [1, 2, 3])
    
        # Test dates outside the support with select
        t = date2index(datetime(1949, 12, 1), nutime, select='nearest')
        assert_equal(t, 0)
    
        t = date2index(datetime(1978, 1, 1), nutime, select='nearest')
        assert_equal(t, 365)
    
        # Test dates outside the support with before
        self.assertRaises(
            ValueError, date2index, datetime(1949, 12, 1), nutime, select='before')
    
        t = date2index(datetime(1978, 1, 1), nutime, select='before')
        assert_equal(t, 365)
    
        # Test dates outside the support with after
        t = date2index(datetime(1949, 12, 1), nutime, select='after')
        assert_equal(t, 0)
    
        self.assertRaises(
            ValueError, date2index, datetime(1978, 1, 1), nutime, select='after')
        # test microsecond and millisecond units
        unix_epoch = "milliseconds since 1970-01-01T00:00:00Z"
        d = datetime(2038, 1, 19, 3, 14, 7)
        millisecs = int(
            date2num(d, unix_epoch, calendar='proleptic_gregorian'))
        assert_equal(millisecs, (2 ** 32 / 2 - 1) * 1000)
        unix_epoch = "microseconds since 1970-01-01T00:00:00Z"
        microsecs = int(date2num(d, unix_epoch))
        assert_equal(microsecs, (2 ** 32 / 2 - 1) * 1000000)
        # test microsecond accuracy in date2num/num2date roundtrip
        # note: microsecond accuracy lost for time intervals greater
        # than about 270 years.
        units = 'microseconds since 1776-07-04 00:00:00-12:00'
        dates = [datetime(1962, 10, 27, 6, 1, 30, 9001),
                 datetime(1993, 11, 21, 12, 5, 25, 999),
                 datetime(1995, 11, 25, 18, 7, 59, 999999)]
        times2 = date2num(dates, units)
        dates2 = num2date(times2, units)
>       datediff = abs(dates-dates2)
E       TypeError: unsupported operand type(s) for -: 'datetime.datetime' and 'cftime._cftime.DatetimeGregorian'

test/test_cftime.py:1107: TypeError
______________________________ DateTime.test_add _______________________________

self = <test.test_cftime.DateTime testMethod=test_add>

    def test_add(self):
        dt = self.date1_365_day
        # datetime + timedelta
        self.assertEqual(dt + self.delta, # add 25 hours
                         dt.replace(day=dt.day + 1, hour=dt.hour + 1))
    
        # timedelta + datetime
>       self.assertEqual(self.delta + dt, # add 25 hours
                         dt.replace(day=dt.day + 1, hour=dt.hour + 1))
E       TypeError: unsupported operand type(s) for +: 'datetime.timedelta' and 'cftime._cftime.DatetimeNoLeap'

test/test_cftime.py:1199: TypeError
______________________________ DateTime.test_sub _______________________________

self = <test.test_cftime.DateTime testMethod=test_sub>

    def test_sub(self):
        # subtracting a timedelta
        previous_day = self.date1_365_day - self.delta
        self.assertEqual(previous_day.day, self.date1_365_day.day - 1)
    
        def total_seconds(td):
            """Equivalent to td.total_seconds() on Python >= 2.7. See
            https://docs.python.org/2/library/datetime.html#datetime.timedelta.total_seconds
            """
            return (td.microseconds + (td.seconds + td.days * 24 * 3600) * 10**6) / 10**6
    
        # sutracting two cftime.datetime instances
        delta = self.date2_365_day - self.date1_365_day
        # date1 and date2 are exactly one day apart
        self.assertEqual(total_seconds(delta), 86400)
    
        # subtracting cftime.datetime from datetime.datetime
>       delta = self.datetime_date1 - self.date3_gregorian
E       TypeError: unsupported operand type(s) for -: 'datetime.datetime' and 'cftime._cftime.DatetimeGregorian'

test/test_cftime.py:1254: TypeError
=============================== warnings summary ===============================
../../../../usr/lib64/python3.11/site-packages/numpy/distutils/ccompiler.py:8
  /usr/lib64/python3.11/site-packages/numpy/distutils/ccompiler.py:8: DeprecationWarning: The distutils package is deprecated and slated for removal in Python 3.12. Use setuptools or check PEP 632 for potential alternatives
    from distutils import ccompiler

../../../../usr/lib64/python3.11/site-packages/numpy/distutils/ccompiler.py:17
  /usr/lib64/python3.11/site-packages/numpy/distutils/ccompiler.py:17: DeprecationWarning: The distutils.sysconfig module is deprecated, use sysconfig instead
    from distutils.sysconfig import customize_compiler

-- Docs: https://docs.pytest.org/en/stable/warnings.html
=========================== short test summary info ============================
FAILED test/test_cftime.py::TestDate2index::test_select_nc - TypeError: unsup...
FAILED test/test_cftime.py::DateTime::test_add - TypeError: unsupported opera...
FAILED test/test_cftime.py::DateTime::test_sub - TypeError: unsupported opera...
================= 3 failed, 2254 passed, 2 warnings in 48.70s ==================

https://docs.python.org/3.11/whatsnew/3.11.html

For the build logs, see:
https://copr-be.cloud.fedoraproject.org/results/@python/python3.11/fedora-rawhide-x86_64/03525898-python-cftime/

For all our attempts to build python-cftime with Python 3.11, see:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/package/python-cftime/

Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.11:
https://copr.fedorainfracloud.org/coprs/g/python/python3.11/

Let us know here if you have any questions.

Python 3.11 is planned to be included in Fedora 37. To make that update smoother, we're building Fedora packages with all pre-releases of Python 3.11.
A build failure prevents us from testing all dependent packages (transitive [Build]Requires), so if this package is required a lot, it's important for us to get it fixed soon.
We'd appreciate help from the people who know this package best, but if you don't want to work on this now, let us know so we can try to work around it on our side.