Vedran Čačić <ved...@gmail.com> added the comment:
Well, yes, floats are innacurate. Do you really expect to normalize Counters
containing values like a googol, or was it just a strawman? For me, it is much
more imaginable* that total be zero because you have a negative value (e.g.
{'spam': -1, 'eggs': 1}) than because you had a googol in your Counter at some
time in the past.
(*) Note that the documentation says
> Counts are allowed to be any integer value including zero or _negative_
> counts. (emphasis mine)
... and floats are only mentioned at the bottom, in a Note. Besides, floats
have that problem already, even with an existing API:
>>> from collections import Counter as C
>>> big = C(spam=1e100)
>>> c = C(spam=1)
>>> not +c
False
>>> c.update(big)
>>> c.subtract(big)
>>> not +c
True
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue25478>
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