How to use the cbor2.compat.timezone.utc function in cbor2

    ('c11a514b67b0', datetime(2013, 3, 21, 20, 4, 0, tzinfo=timezone.utc)),
    ('c11a514b67b0', datetime(2013, 3, 21, 22, 4, 0, tzinfo=timezone(timedelta(hours=2))))
], ids=['datetime/utc', 'datetime+micro/utc', 'datetime/eet', 'timestamp/utc', 'timestamp/eet'])
def test_datetime(impl, payload, expected):
    decoded = impl.loads(unhexlify(payload))
    assert decoded == expected

     datetime(2013, 3, 21, 20, 4, 0, tzinfo=timezone.utc)),
    ('c0781b323031332d30332d32315432303a30343a30302e3338303834315a',
     datetime(2013, 3, 21, 20, 4, 0, 380841, tzinfo=timezone.utc)),
    ('c07819323031332d30332d32315432323a30343a30302b30323a3030',
     datetime(2013, 3, 21, 22, 4, 0, tzinfo=timezone(timedelta(hours=2)))),
    ('c11a514b67b0', datetime(2013, 3, 21, 20, 4, 0, tzinfo=timezone.utc)),
    ('c11a514b67b0', datetime(2013, 3, 21, 22, 4, 0, tzinfo=timezone(timedelta(hours=2))))
], ids=['datetime/utc', 'datetime+micro/utc', 'datetime/eet', 'timestamp/utc', 'timestamp/eet'])
def test_datetime(impl, payload, expected):
    decoded = impl.loads(unhexlify(payload))
    assert decoded == expected

def test_datetime(impl, value, as_timestamp, expected):
    expected = unhexlify(expected)
    assert impl.dumps(value, datetime_as_timestamp=as_timestamp, timezone=timezone.utc) == expected

    (datetime(2013, 3, 21, 20, 4, 0, 380841, tzinfo=timezone.utc), False,
     'c0781b323031332d30332d32315432303a30343a30302e3338303834315a'),
    (datetime(2013, 3, 21, 22, 4, 0, tzinfo=timezone(timedelta(hours=2))), False,
     'c07819323031332d30332d32315432323a30343a30302b30323a3030'),
    (datetime(2013, 3, 21, 20, 4, 0), False, 'c074323031332d30332d32315432303a30343a30305a'),
    (datetime(2013, 3, 21, 20, 4, 0, tzinfo=timezone.utc), True, 'c11a514b67b0'),
    (datetime(2013, 3, 21, 20, 4, 0, 123456, tzinfo=timezone.utc), True, 'c1fb41d452d9ec07e6b4'),
    (datetime(2013, 3, 21, 22, 4, 0, tzinfo=timezone(timedelta(hours=2))), True, 'c11a514b67b0')
], ids=[
    'datetime/utc',
    'datetime+micro/utc',
    'datetime/eet',
    'naive',
    'timestamp/utc',
    'timestamp+micro/utc',
    'timestamp/eet'
])

return 'UTC+00:00'

    def as_unicode(string):
        return string.decode('utf-8')

    def iteritems(self):
        return self.iteritems()

    def int2bytes(i):
        hexstr = '%x' % i
        n = len(hexstr)
        pad = ('', '0')[n & 1]
        return unhexlify(pad + hexstr)

    byte_as_integer = ord
    timezone.utc = timezone(timedelta(0))
    xrange = xrange  # noqa: F821
    long = long  # noqa: F821
    unicode = unicode  # noqa: F821
else:
    from collections.abc import Mapping  # noqa: F401
    from datetime import timezone

    def byte_as_integer(bytestr):
        return bytestr[0]

    def as_unicode(string):
        return string

    def iteritems(self):
        return self.items()

def decode_epoch_datetime(self):
        # Semantic tag 1
        value = self._decode()
        return self.set_shareable(datetime.fromtimestamp(value, timezone.utc))

if match:
            (
                year,
                month,
                day,
                hour,
                minute,
                second,
                micro,
                offset_h,
                offset_m,
            ) = match.groups()
            if offset_h:
                tz = timezone(timedelta(hours=int(offset_h), minutes=int(offset_m)))
            else:
                tz = timezone.utc

            return self.set_shareable(datetime(
                int(year), int(month), int(day),
                int(hour), int(minute), int(second), int(micro or 0), tz))
        else:
            raise CBORDecodeValueError(
                'invalid datetime string: {!r}'.format(value))