| f | from collections import Counter | f | from collections import Counter | 
            |  |  |  |  | 
            |  | class DefCounter(Counter): |  | class DefCounter(Counter): | 
            |  |  |  |  | 
            | n | def __init__(self, iterable=None, missing=-1, **kwargs): | n | def __init__(self, seq=None, missing=-1, **kwargs): | 
            |  | super().__init__(iterable, **kwargs) |  | super().__init__(seq, **kwargs) | 
            |  | self.missing = missing |  | self.missing = missing | 
            |  |  |  |  | 
            |  | def __missing__(self, key): |  | def __missing__(self, key): | 
            |  | return self.missing |  | return self.missing | 
            |  |  |  |  | 
            |  | def __abs__(self): |  | def __abs__(self): | 
            | t | return sum([i for i in self.values() if i > 0]) | t | return sum((v for v in self.values() if v > 0)) |