Python - Get leaves count in a dictionary

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def get_dict_leaves_count(dic):
    if len(dic) == 0:
        return 0
    else:
        cnt = 0
        for k, v in dic.items():
            if not isinstance(v, Mapping):
                cnt += 1
            else:
                cnt += get_dict_leaves_count(v)
        return cnt

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