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1# This file is part of obs_base. 

2# 

3# Developed for the LSST Data Management System. 

4# This product includes software developed by the LSST Project 

5# (http://www.lsst.org). 

6# See the COPYRIGHT file at the top-level directory of this distribution 

7# for details of code ownership. 

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 GNU General Public License 

20# along with this program. If not, see <http://www.gnu.org/licenses/>. 

21 

22__all__ = ("FitsGenericFormatter", ) 

23 

24import os.path 

25 

26from lsst.daf.butler.formatters.file import FileFormatter 

27 

28 

29class FitsGenericFormatter(FileFormatter): 

30 """Interface for reading and writing objects that support the standard 

31 afw I/O readFits/writeFits methods. 

32 """ 

33 extension = ".fits" 

34 

35 def _readFile(self, path, pytype): 

36 """Read a file from the path in FITS format. 

37 

38 Parameters 

39 ---------- 

40 path : `str` 

41 Path to use to open the file. 

42 pytype : `class` 

43 Class to use to read the FITS file. 

44 

45 Returns 

46 ------- 

47 data : `object` 

48 Instance of class `pytype` read from FITS file. None 

49 if the file could not be opened. 

50 """ 

51 if not os.path.exists(path): 51 ↛ 52line 51 didn't jump to line 52, because the condition on line 51 was never true

52 return None 

53 

54 return pytype.readFits(path) 

55 

56 def _writeFile(self, inMemoryDataset): 

57 """Write the in memory dataset to file on disk. 

58 

59 Parameters 

60 ---------- 

61 inMemoryDataset : `object` 

62 Object to serialize. 

63 

64 Raises 

65 ------ 

66 Exception 

67 The file could not be written. 

68 """ 

69 inMemoryDataset.writeFits(self.fileDescriptor.location.path)