[英]Convert a dictionary of lists into a list of dictionaries
I have the following Dictionary Object:我有以下字典对象:
Input = {'userName': ['psrr_api@auto-grid.com', 'ps_api1@auto-grid.com'],
'password': ['Everseeource2016!', 'Eversource2016!']}
Which will then result in this specific output:这将导致这个特定的输出:
output = [{'UserName':'ps_api@auto-grid.com','password': 'Eversource2016!'},
{'userName':'ps_api1@auto-grid.com','password':'Eversource2016!'}]
I'm not sure how I would approach this problem and any help would be appreciated.我不确定我将如何解决这个问题,任何帮助将不胜感激。
Use a zip
to iterate over two lists as the same time.使用
zip
同时迭代两个列表。 Use a dict constructor
to create individual dictionaries, inside a list comprehension
to handle automatically looping.使用
dict constructor
创建单独的字典,在list comprehension
中自动处理循环。
Input = {'userName': ['psrr_api@auto-grid.com', 'ps_api1@auto-grid.com'], 'password': ['Everseeource2016!', 'Eversource2016!']}
Output = [ {'UserName':u, 'password':p} for u,p in zip(Input['userName'], Input['password']) ]
In many NoSQL engines data is generally stored in a nested way, for your case it would be:在许多 NoSQL 引擎中,数据通常以嵌套方式存储,对于您的情况,它将是:
{'ID_1':
{
'username':'psrr_api@auto-grid.com',
'password': 'Everseeource2016'
},
'ID_2':{
'username':'ps_api1@auto-grid.com',
'password': 'Eversource2016!'
}
}
This provides an efficient way to access the data through the ID's这提供了一种通过 ID 访问数据的有效方法
Here's the code for converting the format: This code is generic - means you don't have to specify the keys, in this case: username
and password
,这是转换格式的代码:此代码是通用的 - 意味着您不必指定密钥,在这种情况下:
username
和password
,
from collections import defaultdict
data = defaultdict(dict)
for idx in range(len(Input.values()[0])):
for key in Input.keys():
data['ID_'+str(idx)].update({key: Input[key][idx]})
print data
And if by chance you need a variable number of keys, you can generalize to:如果您碰巧需要可变数量的键,您可以概括为:
Code:代码:
keys = [(k,) * len(data[k]) for k in data.keys()]
data_vals = [data[k] for k in data.keys()]
output = [dict(kv) for kv in
(zip(*pairs) for pairs in zip(zip(*keys), zip(*data_vals)))]
Test Code:测试代码:
data = {'userName': ['psrr_api@auto-grid.com', 'ps_api1@auto-grid.com'],
'password': ['Everseeource2016!', 'Eversource2016!']}
for i in output:
print(i)
Output:输出:
{'userName': 'psrr_api@auto-grid.com', 'password': 'Everseeource2016!'}
{'userName': 'ps_api1@auto-grid.com', 'password': 'Eversource2016!'}
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