Coverage for gpaw/utilities/debug.py: 12%

1def frozen(cls): 

2 """Make sure attributes do not appear out of nowhere. 

3 

4 From: 

5 

6 https://stackoverflow.com/questions/3603502/ 

7 prevent-creating-new-attributes-outside-init 

8 """ 

9 def frozensetattr(self, key, value): 

10 import inspect 

11 if not hasattr(self, key) and inspect.stack()[1][3] != '__init__': 

12 raise AttributeError('Class {} is frozen. Cannot set {}' 

13 .format(cls.__name__, key)) 

14 else: 

15 self.__dict__[key] = value 

16 

17 cls.__setattr__ = frozensetattr 

18 return cls