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In [1]: from collections import defaultdict s = 'mississippi' d = defaultdict(int) for k in s: d[k] += 1
from collections import defaultdict s = 'mississippi' d = defaultdict(int) for k in s: d[k] += 1
In [3]: d.items()
d.items()
Out[3]: dict_items([('m', 1), ('i', 4), ('s', 4), ('p', 2)])
dict_items([('m', 1), ('i', 4), ('s', 4), ('p', 2)])