Raymond,
I think you made a typographical error in your Counter.update example.
>>> from collections import Counter
>>> c = Counter(a=4, b=2, c=0, d=-2)
>>> d = Counter(a=1, b=-5, c=-2, d=6)
>>> c.update(d)
>>> c
Counter({'a': 5, 'd': 4, 'c': -2, 'b': -3})
Pair programming
> On Nov 23, 2015, at 10:43 AM, Vlastimil Brom wrote:
>
>> Is there any particular reason counters drop negative values when you add
>> them together? I definitely expected them to act like ints do when you add
>> negatives, and had to subclass it to get what I think is the obvious
>> behavior.
2015-11-23 7:21 GMT+01:00 Alexander Walters :
> collections.Counter.__add__ as a bit of a quirk.
>
> Counters allow for negative numbers. You can subtract from a counter into
> the negative no problem. However, if you have a counter with a negative
> value and add it to another counter, and if th
collections.Counter.__add__ as a bit of a quirk.
Counters allow for negative numbers. You can subtract from a counter
into the negative no problem. However, if you have a counter with a
negative value and add it to another counter, and if that value, after
addition, would still be negative..
