sha,message,author_date,committer_date,raw_author,raw_committer,repo,author,committer c2cd1dd27fa0723f498c9cbe758cce413f6d91bd,Mark `test_use_cftime_false_standard_calendar_in_range` as an expected failure (#8996),2024-05-03T15:21:48Z,2024-05-03T15:21:48Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 2983c5326c085334ed3e262db1ac3faa0e784586,Fix non-nanosecond casting behavior for `expand_dims` (#8782),2024-02-27T18:51:49Z,2024-02-27T18:51:49Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 d8c3b1ac591914998ce608159a15b4b41cc53c73,"Add chunk-friendly code path to `encode_cf_datetime` and `encode_cf_timedelta` (#8575) * Add proof of concept dask-friendly datetime encoding * Add dask support for timedelta encoding and more tests * Minor error message edits; add what's new entry * Add return type for new tests * Fix typo in what's new * Add what's new entry for update following #8542 * Add full type hints to encoding functions * Combine datetime64 and timedelta64 zarr tests; add cftime zarr test * Minor edits to what's new * Address initial review comments * Add proof of concept dask-friendly datetime encoding * Add dask support for timedelta encoding and more tests * Minor error message edits; add what's new entry * Add return type for new tests * Fix typo in what's new * Add what's new entry for update following #8542 * Add full type hints to encoding functions * Combine datetime64 and timedelta64 zarr tests; add cftime zarr test * Minor edits to what's new * Address initial review comments * Initial work toward addressing typing comments * Restore covariant=True in T_DuckArray; add type: ignores * Tweak netCDF3 error message * Move what's new entry * Remove extraneous text from merge in what's new * Remove unused type: ignore comment * Remove word from netCDF3 error message",2024-01-29T19:12:30Z,2024-01-29T19:12:30Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 dfe6435c270957b0322e0d31db4f59a257f2d54d,"Deprecate certain cftime frequency strings following pandas (#8415) * Deprecate certain frequency strings following pandas [test-upstream] Specifically the frequency strings ""A"", ""AS"", ""Q"", ""M"", ""H"", ""T"", ""S"", ""L"", ""U"", and ""N"" are deprecated in favor of ""Y"", ""YS"", ""QE"", ""ME"", ""h"", ""min"", ""s"", ""ms"", ""us"", and ""ns"", respectively. * Apply suggestions from code review Co-authored-by: Pascal Bourgault --------- Co-authored-by: Pascal Bourgault Co-authored-by: Deepak Cherian ",2023-11-16T15:19:40Z,2023-11-16T15:19:40Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 d933578ebdc4105a456bada4864f8ffffd7a2ced,"Port fix from pandas-dev/pandas#55283 to cftime resample (#8393) * Port fix from pandas-dev/pandas#55283 to cftime resample [test-upstream] * Skip test for pandas versions older than 2.2 [test-upstream] * Update doc/whats-new.rst Co-authored-by: Justus Magin --------- Co-authored-by: Deepak Cherian Co-authored-by: Justus Magin ",2023-11-02T04:12:51Z,2023-11-02T04:12:51Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 1b0012a44aa45c67858489bc815928e1712dbd00,Fix time encoding regression (#8272),2023-10-06T14:08:51Z,2023-10-06T14:08:51Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 c9c1c6d681b68d36c3145da3223f16d649fcf9ab,"Continue to use nanosecond-precision Timestamps in precision-sensitive areas (#7731) * [test-upstream] use nanosecond-precision timestamps for now * [test-upstream] allow kwargs to be passed to nanosecond_precision_timestamp * unpin `pandas` * Add type hint for nanosecond_precision_timestamp Co-authored-by: Illviljan <14371165+Illviljan@users.noreply.github.com> * Add one more TODO comment * Remove deleted attributes in CFTimeIndex documentation * Add a what's new entry * Remove one more attribute from api-hidden.rst * Silence conversion warnings in tests * Silence more conversion warnings --------- Co-authored-by: Deepak Cherian Co-authored-by: Justus Magin Co-authored-by: Illviljan <14371165+Illviljan@users.noreply.github.com>",2023-04-13T14:58:33Z,2023-04-13T14:58:33Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 84607c3b1d61e3bc2d4b07b4f12f41a40b027f6f,"Preserve formatting of reference time units under pandas 2.0.0 (#7441) * [test-upstream] Preserve formatting of reference time units Changes in pandas 2.0.0 interfere with the way we expect some times to be formatted. * Use strftime to force expected date format Co-authored-by: Justus Magin * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * [test-upstream] Preserve formatting of reference time units Changes in pandas 2.0.0 interfere with the way we expect some times to be formatted. * Use strftime to force expected date format Co-authored-by: Justus Magin * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * [test-upstream] Remove old comment and move what's new entry to latest version * [test-upstream] remove old comment and move what's new entry * Update xarray/core/formatting.py * Use isoformat() now that pandas zero-pads years Co-authored-by: Justus Magin * [test-upstream] update what's new * replace the `isoformat` separator with `"" ""` [test-upstream] * use the `sep` parameter to `isoformat` instead Co-authored-by: Spencer Clark * Update doc/whats-new.rst --------- Co-authored-by: Deepak Cherian Co-authored-by: Justus Magin Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Justus Magin ",2023-04-01T12:36:55Z,2023-04-01T12:36:55Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 6d771fc82228bdaf8a4b77d0ceec1cc444ebd090,"Preserve `base` and `loffset` arguments in `resample` (#7444) * [test-upstream] Preserve base and loffset arguments in resample While pandas is getting set to remove these, we have not had a chance to emit a deprecation warning yet for them in xarray. This should hopefully give users some extra time to adapt. * Emit warning when base is not None Co-authored-by: Deepak Cherian * Modify warnings to refer loffset and base as parameters; add tests * Add type validation for loffset arguments * Add typing and support for pd.Timedelta as an loffset * pd.Timedelta is a subclass of datetime.timedelta * [test-upstream] Remove unneeded skipif * Fix failing tests * [test-upstream] Add return type to tests * [test-upstream] Update documentation * [test-upstream] Fix mypy errors in tests * Move _convert_base_to_offset to pdcompat and add a few more tests * Use offset instead of base in documentation --------- Co-authored-by: Deepak Cherian ",2023-03-08T16:55:21Z,2023-03-08T16:55:21Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 fb748be127c88b4bbd0c7f654e0a0d2ebd154ef8,"Add `inclusive` argument to `cftime_range` and `date_range` and deprecate `closed` argument (#7373) * Add inclusive argument to cftime_range and date_range; deprecate closed * Add documentation of deprecation * Update xarray/coding/cftime_offsets.py Co-authored-by: Justus Magin * [skip-ci] [test-upstream] Update xarray/coding/cftime_offsets.py * [test-upstream] Use parameter instead of argument when describing function signature * [test-upstream] Add references to pandas PRs for _NoDefault * [test-upstream] Move _NoDefault to pdcompat; fix doc build * Apply suggestions from code review Co-authored-by: Spencer Clark * Update xarray/coding/cftime_offsets.py Co-authored-by: Spencer Clark --------- Co-authored-by: Deepak Cherian Co-authored-by: Justus Magin ",2023-02-06T17:51:46Z,2023-02-06T17:51:46Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 1581fe84c3946928839d643ccb36d53a54ca475e,Fix PR number in what’s new (#7331),2022-11-29T07:37:05Z,2022-11-29T07:37:05Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 1083c9d3f9ff7b5b03ffb65fa0cf7876c2e73a1a,"Enable `origin` and `offset` arguments in `resample` (#7284) * Initial work toward enabling origin and offset arguments in resample * [pre-commit.ci] auto fixes from pre-commit.com hooks for more information, see https://pre-commit.ci * Fix _convert_offset_to_timedelta * Reduce number of tests * Address initial review comments * Add more typing information * Make cftime import lazy * Fix module_available import and test * Remove old origin argument * Add type annotations for resample_cftime.py * Add None as a possibility for closed and label * Add what's new entry * Add missing type annotation * Delete added line * Fix typing errors * Add comment and test for as_timedelta stub * Remove old code * [test-upstream] Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Deepak Cherian ",2022-11-28T23:38:52Z,2022-11-28T23:38:52Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 a744e63642e066b2c25778f40fec63fc47d15a7b,"Improve non-nanosecond warning (#7238) * Point to Variable or DataArray constructor in non-nanosecond warning * [test-upstream] Use find_stack_level function from pandas",2022-11-04T20:13:18Z,2022-11-04T20:13:18Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 be6594e6e327c95cfa64c8c6c06143022d0b6743,"Emit a warning when converting datetime or timedelta values to nanosecond precision (#7201) * [test-upstream] Emit a warning when converting to nanosecond precision * Assert nanosecond dtype after conversion in all cases * Apply suggestions from code review Co-authored-by: Illviljan <14371165+Illviljan@users.noreply.github.com> * [test-upstream] add separate test for second-precision TimedeltaIndex Co-authored-by: Illviljan <14371165+Illviljan@users.noreply.github.com>",2022-10-26T16:00:33Z,2022-10-26T16:00:33Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 9df2dfca57e1c672f6faf0f7945d2f38921a4bb2,"Set `longdouble=False` in `cftime.date2num` within the date encoding context (#7171) Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>",2022-10-18T16:37:56Z,2022-10-18T16:37:56Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 96db9f804cf6bb3ed5e333237b69cb7c47b527e3,"Include variable name in message if `decode_cf_variable` raises an error (#7147) * Include variable name in message if decode_cf_variable raises an error * flake8",2022-10-12T15:25:41Z,2022-10-12T15:25:41Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 25537623edafd4a2f99a011ebb91ae55bccb96a2,"Enable taking the mean of dask-backed cftime arrays (#6940) Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com> Co-authored-by: Deepak Cherian ",2022-09-09T16:48:19Z,2022-09-09T16:48:19Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 77d961a8c43444e16b51e9700e7805a9e7e0d190,Simplify datetime64 `dt.calendar` tests (#6988),2022-09-08T23:34:43Z,2022-09-08T23:34:43Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 6c8db5ed005e000b35ad8b6ea9080105e608e976,Accommodate `OutOfBoundsTimedelta` error when decoding times (#6717),2022-06-24T18:48:18Z,2022-06-24T18:48:18Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 8de706151e183f448e1af9115770713d18e229f1,Fix overflow issue in decode_cf_datetime for dtypes <= np.uint32 (#6598),2022-05-15T14:42:31Z,2022-05-15T14:42:31Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 4b18065af6acff72f479a17bda23b1401285732f,"Ensure datetime-like variables are left unmodified by `decode_cf_variable` (#6489) * Add fix to decode_cf_variable * Add PR link to what's new * Variable.data is not lazy so only attempt it on object type arrays * Add a check that the decoded variable is identical to the input",2022-04-18T15:29:19Z,2022-04-18T15:29:19Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 69dec51cfca065f2abdc9933c938c8c03e694184,Remove use of deprecated `kind` argument in `CFTimeIndex` tests (#5723),2021-10-24T09:55:33Z,2021-10-24T09:55:33Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 b34f92b1bbe0d85ac51db7b7eb5ff02431242edc,[test-upstream] Install upstream version of nc-time-axis in upstream build (#5744),2021-08-27T12:49:32Z,2021-08-27T12:49:32Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 5a14d7d398be7e0efc6d5c8920dc8886212c3b2a,Explicitly state datetime units in array constructors in `test_datetime_mean` (#5463),2021-06-12T12:58:42Z,2021-06-12T12:58:42Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 2290a5fd8e1b2ae49a1276364c0f1c0524abbf60,Remove xfail decorator from nc-time-axis tests (#5461),2021-06-12T12:57:52Z,2021-06-12T12:57:52Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 ca72d56c213a1c47e54b12ee559f412e60fbf9b1,"Make `kind` argument in `CFTimeIndex._maybe_cast_slice_bound` optional (#5359) * [test-upstream] Make kind argument in CFTimeIndex._maybe_cast_slice_bound optional * Update doc/whats-new.rst Co-authored-by: keewis Co-authored-by: keewis ",2021-05-23T00:13:19Z,2021-05-23T00:13:19Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 44f4ae11019ca9c9e7280c41d9d2fd86cf86ccce,Convert calendar to lowercase in standard calendar checks (#5180),2021-04-18T10:17:08Z,2021-04-18T10:17:08Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 9b60f01066c1209b719ab3a3b111aa66b5fc3e26,Catch either OutOfBoundsTimedelta or OverflowError in CFTimeIndex.__sub__ and CFTimeIndex.__rsub__ (#5154),2021-04-14T13:27:10Z,2021-04-14T13:27:10Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 b610a3c4317474b4b999c23cf66d1dc55c9b3cd6,"Adapt exception handling in CFTimeIndex.__sub__ and __rsub__ (#5006) The latest version of pandas raises an OutOfBoundsTimedelta error instead of an Overflow error.",2021-03-07T13:22:02Z,2021-03-07T13:22:02Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 f554d0a487d8ee286c96002a09f00379c80bd7f4,Add DataArrayCoarsen.reduce and DatasetCoarsen.reduce methods (#4939),2021-02-23T16:01:27Z,2021-02-23T16:01:27Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 10f0227a1667c5ab3c88465ff1572065322cde77,Ensure maximum accuracy when encoding and decoding cftime.datetime values (#4758),2021-02-10T21:44:25Z,2021-02-10T21:44:25Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 46591d28d9fbbfc184aaf4075d330b1c8f070627,Modify _encode_datetime_with_cftime for compatibility with cftime > 1.4.0 (#4871),2021-02-07T23:12:29Z,2021-02-07T23:12:29Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 ed255736664f8f0b4ea199c8f91bffaa89522d03,"Ensure maximum accuracy when encoding and decoding np.datetime64[ns] values (#4684) * Use integers when possible to encode/decode times * Improve tests * Further improvements to tests * Remove optimization in favor of maximum correctness * Remove print statements * Restore optimization * Add a what's new entry * Add test for decoding timedeltas with nanosecond units too * Some minor cleanups * Add comment to motivate new test * Add some print statements to try and debug things on Windows * xfail round-trip test on Windows; remove print statements * Don't xfail Windows tests for now; we should figure why they fail * Fix things on Windows * Use pandas for divisiblity check for older NumPy compatibility * Reduce changes needed; improve comments * Checking remainder against zero nanoseconds is more straightforward It probably doesn't really matter though. * Add a note to the breaking changes section",2021-01-03T23:39:03Z,2021-01-03T23:39:03Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 0f0a5ed8521172bd1e9e217c6fd6db8e23d5be56,Eliminate use of calendar-naive cftime objects (#4517),2020-10-19T15:20:36Z,2020-10-19T15:20:36Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 5198360c0bc28dd7528e909c6b6ccffe731474ad,"Allow for datetime strings formatted following the default cftime format in cftime_range and partial datetime string indexing (#4343) * Expand accepted partial datetime string patterns * Update doc/weather-climate.rst Co-authored-by: Mathias Hauser Co-authored-by: Mathias Hauser ",2020-08-17T23:27:06Z,2020-08-17T23:27:06Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 26547d19d477cc77461c09b3aadd55f7eb8b4dbf,Fix bug in computing means of cftime.datetime arrays (#4344),2020-08-15T20:05:22Z,2020-08-15T20:05:22Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 50dcdacc98906f5f5721bb6bbe1b9cef2425dc1e,Un-xfail cftime plotting tests (#4272),2020-07-26T19:04:54Z,2020-07-26T19:04:54Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 8f688ea92ae8416ecc3e18f6e060dad16960e9ac,Remove outdated note from datetime accessor docstring (#4148),2020-06-11T23:23:28Z,2020-06-11T23:23:28Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 604835603c83618dbe101331813cc6ae428d8be1,"Add a days_in_month accessor to CFTimeIndex (#3935) * Add days_in_month accessor to CFTimeIndex * Add pull request number * Add version-dependent skip for test * Fix pull request number * Strip outputs from notebook; add documentation update note * typo",2020-04-06T14:02:10Z,2020-04-06T14:02:10Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 6bccbff975d59530a8c9cb1979cfcd5c8327254e,Only fail if a specific warning occurs (#3930),2020-04-03T19:35:17Z,2020-04-03T19:35:17Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 b084064fa62d3dedc3706c2f6c2dff90940fec27,Un-xfail test_dayofyear_after_cftime_range (#3907),2020-03-28T14:26:45Z,2020-03-28T14:26:45Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 2d0b85e84fa1d3d540ead8be04fc27703041b2cb,"Re-enable tests xfailed in #3808 and fix new CFTimeIndex failures due to upstream changes (#3874) * Re-enable tests xfailed in #3808 * Add _cache attribute to CFTimeIndex * Temporarily install pandas master from GitHub instead of wheel * Fix pandas url",2020-03-22T22:19:41Z,2020-03-22T22:19:41Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 650a981734ce3291f5aaa68648ebde451339f28a,"Fix CFTimeIndex-related errors stemming from updates in pandas (#3764) * Allow subtraction of a generic Index of cftime.datetimes from a CFTimeIndex * black * Test that NotImplemented logic works * Vendor _get_nearest_indexer and _filter_indexer_tolerance * Test OverflowError in __rsub__ * Fix name of pandas method in docstring * Add what's new entries * Enable use of tolerance greater than 292 years * newlinw Co-authored-by: Deepak Cherian ",2020-03-13T06:14:41Z,2020-03-13T06:14:41Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 45d88fc4b2524ecb0c1236cd31767d00f72b0ea1,"Enable pandas-style rounding of cftime.datetime objects (#3792) * Initial progress on implementing cftime floor/ceil/round * Improve tests and docstrings * Add tests of rounding cftime datetimes via dt accessor * Add documentation * docstring edits * Test rounding raises error with non-fixed frequency * black * typo * A couple cleanup items: - Fix floating point issue in asi8 and add tests - Ensure dask only computes once when using the rounding accessors * black",2020-03-02T09:41:19Z,2020-03-02T09:41:19Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 fd08842e81576f5ea6b826e31bc2031bcca79de2,xfail tests due to #3751 (#3808),2020-02-28T13:39:58Z,2020-02-28T13:39:57Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 b9a920e1a9012e88719cc96e8113bb877279c854,"Reduce length of cftime resample tests (#2879) * Reduce length of cftime resample tests * Update per @jwenfai's suggestions; silence to_datetimeindex warnings * Restore 91% coverage for resample_cftime.py",2019-04-11T11:42:08Z,2019-04-11T11:42:08Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447 612d390f925e5490314c363e5e368b2a8bd5daf0,"Add use_cftime option to open_dataset (#2759) * Add use_cftime option to open_dataset * Remove f-strings * Fix test-skipping logic and remove 'dummy' from warning * Note that use_cftime is only relevant for standard calendar dates * Move use_cftime option to CFDatetimeCoder constructor",2019-02-19T20:47:26Z,2019-02-19T20:47:26Z,f04422bfa03dadc75fab6ce64de238fbe48f5be4,cd792325681cbad9f663f2879d8b69f1edbb678f,13221727,6628425,19864447