a = dict((hash_counting_int(x), []) for x in range(10))
[x.count for x in list(a.keys())]
b = dict(a)
[x.count for x in list(a.keys())]
for n, v in enumerate(b.values()):
    v.append(n)
[x.count for x in list(a.keys())]
b
Как избежать перефразирования ключей dict?