[Python-ideas] Implementing a set of operation (+, /, - *) on dict consistent with linearAlgebrae

[Alexander Belopolsky]

> In [12]: a= mdict(a=[2], b='a')
> In [13]: a+a

Aren't you reinventing the Counter type?

>>> from collections import Counter
>>> c = Counter(a=1,b=2)
>>> c + c
Counter({'b': 4, 'a': 2})
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