New submission from Ethan Furman: According to the docs [1]:
> Counter objects have a dictionary interface except that they return a > zero count for missing items instead of raising a KeyError Which a simple test confirms: --> Counter()['b'] 0 However, if the key is present but set to zero, equality fails: --> Counter() == Counter(b=0) False It is my thought that a Counter with all its keys set to zero is as empty as a Counter with no keys: --> c1 = Counter() --> c2 = Counter(a=0, b=0, c=0) --> for item in c2.keys(): ... assert c2[item] == c1[item] (no execption raised) [1] https://docs.python.org/2/library/collections.html#collections.Counter ---------- messages: 228111 nosy: ethan.furman priority: normal severity: normal status: open title: Counter with no keys does not compare equal to Counter with keys which zero value type: behavior versions: Python 2.7, Python 3.4, Python 3.5 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue22533> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
