1'''A python interface to UNIDATA's UDUNITS-2 package with CF extensions 

2 

3Store, combine and compare physical units and convert numeric values 

4to different units. 

5 

6Units are as defined in UNIDATA's UDUNITS-2 package , except for 

7reference time units (such as 'days since 2000-12-1' in the 

8'proleptic_gregorian' calendar), which are handled by the `cftime` 

9python package. 

10 

11In addition, some units are either new to, modified from, or removed 

12from the standard UDUNITS-2 database in order to be more consistent 

13with the CF conventions. 

14 

15''' 

16 

17__Conventions__ = 'CF-1.8' 

18__author__ = 'David Hassell' 

19__author__ = 'David Hassell' 

20__date__ = '2020-07-24' 

21__version__ = '3.2.9' 

22__cf_version__ = '1.8' 

23 

24from distutils.version import LooseVersion 

25import platform 

26 

27try: 

28 import cftime 

29except ImportError as error1: 

30 raise ImportError(error1) 

31 

32# Check the version of python 

33_minimum_vn = '3.5' 

34if LooseVersion(platform.python_version()) < LooseVersion(_minimum_vn): 

35 raise RuntimeError( 

36 "Bad python version: cfunits requires python version {} or later. " 

37 "Got {}".format( 

38 _minimum_vn, platform.python_version())) 

39 

40# Check the version of cftime 

41_minimum_vn = '1.2.1' 

42if LooseVersion(cftime.__version__) < LooseVersion(_minimum_vn): 

43 raise ValueError( 

44 "Bad cftime version: cfunits requires cftime>={}. Got {} at {}".format( 

45 _minimum_vn, cftime.__version__, cftime.__file__)) 

46 

47from .units import Units