Change log

---

version 3.3.2

---

2021-05-21

• Refactor to remove the dependency on cftime.utime, that was removed at cftime version 1.5.0 (https://github.com/NCAS-CMS/cfunits/issues/25)

• Changed dependency: cftime>=1.5.0

version 3.3.1

---

2020-11-27

• Make invalid units non-equivalent and non-equal (https://github.com/NCAS-CMS/cfunits/issues/19)

version 3.3.0

---

2020-10-09

• Python 3.5 support deprecated (3.5 was retired on 2020-09-13)

• Make Units('') and Units() equivalent (but still not equal).

version 3.2.9

---

2020-07-24

• New attribute: cfunits.Units.has_offset

• cftime.Units.reftime now always returns a cftime.datetime object.

• Fixed bug that caused failure when hashing reference time units.

• Changed dependency: cftime>=1.2.1

version 3.2.8

---

2020-07-02

• Fixed bug that caused failure when an int or float was input to cfunits.Units.conform (https://github.com/NCAS-CMS/cfunits/issues/9).

• Allowed list and tuple to be input to cfunits.Units.conform (https://github.com/NCAS-CMS/cfunits/issues/9).

version 3.2.7

---

2020-05-20

• Minor changes to allow for cftime==1.1.3

• Changed dependency: cftime>=1.1.3

version 3.2.6

---

2020-04-27

• Fixed bug that caused a KeyError: '1r' exception, due to an incorrect format statement.

version 3.2.5

---

2020-03-26

• Check that the udunits2 library exists (with thanks to Gareth Jones).

• Changed dependency: cftime>=1.1.1

version 3.2.4

---

2020-01-07

• Use ctypes.util.find_library to get name of udunits2 library (with thanks to Lance Helsten)

version 3.2.3

---

2019-11-28

• Fixed a bug that raised an exception for units specified by non-strings (https://github.com/NCAS-CMS/cfunits/issues/1).

version 3.2.2

---

2019-09-16

• Added _units_since_reftime attribute.

version 3.2.0

---

2019-09-12

• Added _canonical_calendar attribute.

• Improved testing in Unit.equivalent.

version 3.1.1

---

2019-08-02

• Incremented version.

version 3.1.0

---

2019-08-02

• Added reason_notvalid attribute, and improved handling of invalid calendars.

version 3.0.0

---

2019-05-28

• Python 2 support deprecated.

version 1.9

---

2019-02-14

• Updated documentation to mention the isvalid attribute.

version 1.8

---

2018-09-13

• Trap “ValueError: negative reference year in time units, must be >= 1” so that a Units object is returned that has isvalid=False.

• Added “message” attribute that reports on why bad units are bad. Is “None” if units are OK.

version 1.7

---

2018-08-23

• Python 3 compatibility (with many thanks to Eric Hutton)

version 1.6

---

2018-08-23

• Bad units now do not raise an exception, but may be checked with the “isvalid” attribute.

version 1.5

---

2017-02-24

• Removed explicit dependency checks

• brought in line with cf-python v1.5

Version 1.1.4

---

2016-02-17

• Bug fix to setup.py

Version 1.1

---

2015-10-28

• Bug fix to Units.conform for scalar numpy arrays.

• Removed support for netCDF4-python versions < 1.1.1

• Same as cf/units.py in cf-python version 1.1

version 1.0

---

2015-05-27

• Initial release

• Same as cf/units.py in cf-python version 1.0