根据关键字将列表中的项目添加到现有字典中 [英] adding items from list to existing dictionary based on key

问题描述

说我有这本词典，它使用 id_num 作为键

Say I have this dictionary that uses a id_num as a key

{1665845 : Person(1665845, stuff)} {1294919 : Person(1294919, stuff)}

我还有另一个列表，其中包含[Id_num，日期，数据....]计数。

And I have another list that has lists containing [Id_num, date, data.....] counts.

[[['1665845', '2001-01-06', '28,448,615,27,705'], ['1294919', '2001-01-04', '639,118,328,413,222,491,738,389,11,372,183,650,281,643,26,398,685,171'], ['1294919', '2001-01-03', '771,373']]]

我如何总结所有属于id_num并将其添加为字典中的新项

How can I sum up all the data belonging to the id_num and add it as a new item in the dictionary

{1294919 : Person(1294919, stuff, sum)}

推荐答案

看起来您可以通过collections.defaultdict

Looks like you can achieve this by collections.defaultdict

person_dict = {1665845 : Person(1665845,  stuff), 1294919 : Person(1294919, stuff)}  # existing dictionary
l = [['1665845', '2001-01-06', '28,448,615,27,705'], ['1665845', '2001-01-10', '218,37,356,621,466,319,147,774,231,167,399,150,417,34,3'], ['1294919', '2001-01-04', '639,118,328,413,222,491,738,389,11,372,183,650,281,643,26,398,685,171'], ['1294919', '2001-01-10', '314,611,485,208,515,240,586,511,713,58,28,392,140,529,353,489,375,412,596'], ['1665845', '2001-01-04', '670,665,681,184,22,752,390,523,507,171,467,19,296,720,58,230,721,686'], ['1665845', '2001-01-02', '432,210,732,204,771,555,448,82,343'], ['1294919', '2001-01-06', '113,225,564,554,392,544,313'], ['1294919', '2001-01-05', '437,219,239,545,588,303,477,384,87,254,429,635,188,372,572,712,383'], ['1294919', '2001-01-03', '771,373'], ['1294919', '2001-01-08', '650,679,492,524,202,689,224,268,195,455,400,235,518,505']]

from collections import defaultdict
d_dict = defaultdict(int)
for k,_,v in l:
    d_dict[int(k)]+=sum(int(i) for i in v.split(','))
#dict(d_dict)
#{1294919: 31022, 1665845: 17701} 

for k in person_dict:
    person_dict[k] = Person(k, stuff, d_dict[k])

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