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1# This file is part of daf_butler. 

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"""Support for writing matplotlib figures.""" 

23 

24__all__ = ("MatplotlibFormatter",) 

25 

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

27 

28 

29class MatplotlibFormatter(FileFormatter): 

30 """Interface for writing matplotlib figures. 

31 """ 

32 

33 extension = ".png" 

34 """Matplotlib figures are always written in PNG format.""" 

35 

36 def _readFile(self, path, pytype=None): 

37 # docstring inherited from FileFormatter._readFile 

38 raise NotImplementedError( 

39 f"matplotlib figures cannot be read by the butler; path is {path}") 

40 

41 def _writeFile(self, inMemoryDataset): 

42 # docstring inherited from FileFormatter._writeFile 

43 inMemoryDataset.savefig(self.fileDescriptor.location.path)