python - 从列表中的值向列表中的字典添加键

Question

如果字典包含来自另一个列表中的值的特定键，我如何将键添加到列表中的字典？

我有一个字典列表。这些字典要么只包含一个键('review')，要么包含两个键('review' 和 'response')。当字典包含键“response”时，我想添加两个键，值来自两个列表。

data = [{'response': 'This is a response',
         'review': 'This is a review'},
        {'review': 'This is only a review'},
        {'response': 'This is also a response',
         'review': 'This is also a review'}]
date = ['4 days ago',
        '3 days ago']
responder = ['Manager',
             'Customer service']

我尝试了以下方法，但由于对于包含键“response”的每个字典，我只想从每个列表的值中加 1，所以我不确定如何执行此操作。

for d in data:
    if 'response' in d:
        for i in date:
            d['date'] = i
        for i in responder:
            d['responder'] = i

输出显示它当然只添加列表的最后一个值，因为我正在遍历列表。我该如何解决这个问题？

[{'date': '3 days ago',
  'responder': 'Customer service',
  'response': 'This is a response',
  'review': 'This is a review'},
 {'review': 'This is only a review'},
 {'date': '3 days ago',
  'responder': 'Customer service',
  'response': 'This is also a response',
  'review': 'This is also a review'}]

Answer 1

您可以为您的日期和响应者列表创建一个迭代器，然后在您的 if 语句中调用 next() 以从列表中取出下一个项目

data = [{'response': 'This is a response', 
         'review': 'This is a review'}, 

        {'review': 'This is only a review'}, 

        {'response': 'This is also a response', 
         'review': 'This is also a review'}]

date = ['4 days ago', '3 days ago']
responder = ['Manager', 'Customer service']

d_iter = iter(date)
r_iter = iter(responder)

for d in data:
    if 'response' in d:
        d['date'] = next(d_iter)
        d['responder'] = next(r_iter)

print(data)
>> [
{'date': '4 days ago', 
 'review': 'This is a review', 
 'responder': 'Manager', 
 'response': 'This is a response'},  

{'review': 'This is only a review'}, 

{'date': '3 days ago', 
 'review': 'This is also a review', 
 'responder': 'Customer service', 
 'response': 'This is also a response'}
]