在python的字典中遍历字典

Question

假设我有

dictionary = {
    'Moe': {
             'name':'moe',
             'age':24,
             'married':False
           },
    'Jon': {
             'name':'jon',
             'age':22,
             'married':False
           },
    'andrew': 
           {'name':'andrew',
            'age':27,
            'married':True
           }
}

假设我想在这本字典里反复查一下有多少人结婚了，我该怎么做呢？你知道吗

Answer 1

result = 0
for x in dictionary:
    if dictionary[x]['married'] == True:
        result += 1
print(result)

Answer 2

一种方法是：

n_married = 0 
for key, item in d.items(): 
    name, age, married = item 
    n_married += 1 if married else 0 
print(n_married)

Answer 3

您可以使用以下生成器理解在内部词典中查找married，将默认值设置为0，并采用sum：

sum(i.get('married', 0) for i in dictionary.values())
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