Coverage for python/lsst/daf/base/dateTime/dateTimeContinued.py: 42%

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1# 

2# LSST Data Management System 

3# 

4# Copyright 2008-2017 AURA/LSST. 

5# 

6# This product includes software developed by the 

7# LSST Project (http://www.lsst.org/). 

8# 

9# This program is free software: you can redistribute it and/or modify 

10# it under the terms of the GNU General Public License as published by 

11# the Free Software Foundation, either version 3 of the License, or 

12# (at your option) any later version. 

13# 

14# This program is distributed in the hope that it will be useful, 

15# but WITHOUT ANY WARRANTY; without even the implied warranty of 

16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 

17# GNU General Public License for more details. 

18# 

19# You should have received a copy of the LSST License Statement and 

20# the GNU General Public License along with this program. If not, 

21# see <http://www.lsstcorp.org/LegalNotices/>. 

22 

23__all__ = ["DateTime"] 

24 

25from lsst.utils import continueClass 

26 

27from .._dafBaseLib import DateTime 

28 

29 

30@continueClass # noqa: F811 (FIXME: remove for py 3.8+) 

31class DateTime: # noqa: F811 

32 

33 def toPython(self, timescale=None): 

34 """Convert a DateTime to Python's datetime 

35 

36 Parameters 

37 ---------- 

38 timescale : `dateTime.DateTime.Timescale`, optional 

39 Timescale for resultant datetime. 

40 

41 Returns 

42 ------- 

43 datetime : `datetime.datetime` 

44 The resultant Python `datetime.datetime` object. 

45 

46 Raises 

47 ------ 

48 ValueError 

49 Raised if the DateTime is invalid (uninitialized). 

50 """ 

51 import datetime 

52 if not self.isValid(): 

53 raise RuntimeError("DateTime not valid") 

54 nsecs = self.nsecs(timescale) if timescale is not None else self.nsecs() 

55 return datetime.datetime.utcfromtimestamp(nsecs/10**9) 

56 

57 def toAstropy(self, timescale=None): 

58 """Convert a DateTime to an astropy Time. 

59 

60 Returns 

61 ------- 

62 time : `astropy.time.Time` 

63 This date as an astropy MJD/TAI time. 

64 

65 Raises 

66 ------ 

67 ValueError 

68 Raised if the DateTime is invalid (uninitialized). 

69 """ 

70 # So that astropy is not an import-time dependency of daf_base. 

71 import astropy.time 

72 return astropy.time.Time(self.get(system=DateTime.MJD, scale=DateTime.TAI), scale="tai", format="mjd") 

73 

74 def __repr__(self): 

75 if self.isValid(): 

76 return "DateTime(\"{}\", TAI)".format(self.toString(DateTime.TAI)) 

77 else: 

78 return "DateTime()" 

79 

80 def __reduce__(self): 

81 return (DateTime, (self.nsecs(), ))