Coverage for /pythoncovmergedfiles/medio/medio/usr/local/lib/python3.8/site-packages/importlib_metadata/_collections.py: 100%

1import collections 

2 

3 

4# from jaraco.collections 3.3 

5class FreezableDefaultDict(collections.defaultdict): 

6 """ 

7 Often it is desirable to prevent the mutation of 

8 a default dict after its initial construction, such 

9 as to prevent mutation during iteration. 

10 

11 >>> dd = FreezableDefaultDict(list) 

12 >>> dd[0].append('1') 

13 >>> dd.freeze() 

14 >>> dd[1] 

15 [] 

16 >>> len(dd) 

17 1 

18 """ 

19 

20 def __missing__(self, key): 

21 return getattr(self, '_frozen', super().__missing__)(key) 

22 

23 def freeze(self): 

24 self._frozen = lambda key: self.default_factory() 

25 

26 

27class Pair(collections.namedtuple('Pair', 'name value')): 

28 @classmethod 

29 def parse(cls, text): 

30 return cls(*map(str.strip, text.split("=", 1)))