1# 

2# Copyright (C) 2019-2020 Leo P. Singer <leo.singer@ligo.org> 

3# 

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

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

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

7# (at your option) any later version. 

8# 

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

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

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

12# GNU General Public License for more details. 

13# 

14# You should have received a copy of the GNU General Public License 

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

16# 

17 

18 

19def str_or_collection(values): 

20 if values is None: 

21 values = [] 

22 elif isinstance(values, str): 

23 values = [values] 

24 return values 

25 

26 

27def field_collection(key, values): 

28 return [(key, value) for value in str_or_collection(values)]