基于键值对的Python更新字典 [英] Python update dictionary based on key value pair

问题描述

这个问题是如何检查两个词典列表和相同的键，以及如何使用其他词典中的键值对更新主词典.

this question is how to check two dictionary list and for same keys and update main dictionary with key value pair from other dictionary.

main = [
{'country': u'CYPRUS', 'naziv': 'AKEL', 'FCI': 2}, 
{'country': u'CYPRUS', 'naziv': 'DIKO', 'FCI': 4}, 
]

第二

second = [
{'likes': '8625.00', 'talks': '1215.00', 'naziv': 'AKEL'}, 
{'likes': '2746.00', 'talks': 0, 'naziv': 'DIKO'}, 
]

最终输出-示例

output = [
    {'country': u'CYPRUS', 'naziv': 'AKEL', 'FCI': 2,'likes': '8625.00', 'talks': '1215.00'}
    {'country': u'CYPRUS', 'naziv': 'DIKO', 'FCI': 4,'likes': '2746.00', 'talks': 0}, 
]

有没有快速的方法可以做到这一点.我正在尝试更新一本字典，但不起作用.

Is there any fast way to do this. I was trying with update one dictionary but dont works.

for dt, k in itertools.groupby(sorted(second, key=itemgetter('naziv')), key=itemgetter('naziv')):
    maindict = {'naziv': dt}
    for d in k:
        maindict.update(d)
    main.append(maindict)

Python 2.7

Python 2.7

推荐答案

另一个可能是-

import itertools
main = [
{'country': u'CYPRUS', 'naziv': 'AKEL', 'FCI': 2}, 
{'country': u'CYPRUS', 'naziv': 'DIKO', 'FCI': 4}, 
]
second = [
{'likes': '8625.00', 'talks': '1215.00', 'naziv': 'AKEL'}, 
{'likes': '2746.00', 'talks': 0, 'naziv': 'DIKO'}, 
]


lst = sorted(itertools.chain(main,second), key=lambda x:x['naziv'])
list_c = []
for k,v in itertools.groupby(lst, key=lambda x:x['naziv']):
    d = {}
    for dct in v:
        d.update(dct)
    list_c.append(d)
print list_c

吉尔森的无表情副本"

"Shemeless copy of mgilson"

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