python：从defaultdict中删除类型

Question

我有以下代码：

#!/usr/bin/python
farm_sub_count = [[['Farm', u'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Premium'], 2], [['Farm', u'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Standard'], 2], [['Farm', u'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Premium'], 1]]

from collections import defaultdict
d = defaultdict(lambda: defaultdict(int))
for (a, b), c in farm_sub_count:
    d[a][b] += c

print( dict(d) )
print( dict.__repr__(d) )

我得到以下输出：

    {Farm - defaultdict(<type 'int'>, {u'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Standard': 2, u'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Premium': 3})

我不想看到类型，我只是想看日期：

    {Farm: {u'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Standard': 2, u'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Premium': 3})}

我看着其他人，他们建议把它转换为dic：

print( dict(d) )

或

print( dict.__repr__(d) )

我仍然得到类型

Answer 1

您有嵌套结构，defaultdict包含defaultdict个实例。你只转换了最外面的对象;你需要创建一个深层副本。

您可以使用字典理解生成一个新字典，以创建2级深度的副本：

{k: dict(v) for k, v in d.items()}

另外，使用defaultdict对象构建数据结构：

d = {}
for (a, b), c in farm_sub_count:
    inner = d.setdefault(a, {})
    inner[b] = inner.get(b, 0) + c

Answer 2

有两个“for”循环：

 from collections import defaultdict
    d = defaultdict(lambda: defaultdict(int))
    for (a, b), c in farm_sub_count:
        d[a][b] += c
    objArray = []
    printobj = {}
    finalobj = {}
    for i in d:
        for k in d[i]:
            printobj = {k : d[i][k]}
            objArray.append(printobj)
        finalobj= {i: objArray} 
        print(finalobj)

输出

{'Farm': [{'Red Hat Enterprise Linux for Virtual Datacenters with Smart Management, Premium': 3}, {'Red Hat Enterprise Linux for Virtual Datacenterswith Smart Management, Standard': 2}]}