在python中组合多个对象并创建重叠png属性列表

Question

我有一个这样的类：

class test(object):
def __init__(self, ID, A, B, C, D, E):
self.ID = ID
self.A = A
self.B = B
self.C = C
self.D = D
self.E = E

以及列表中的多个对象：

test1 = test(6124, 6, 'Tim', 'Football', 'Soccer', 'USA')
test2 = test(6124, 7, 'Joe', 'Basketball', 'Soccer', 'USA')
test3 = test(6188, 8, 'Joe', 'Basketball', 'Soccer', 'USA')
test4 = test(6188, 9, 'Joe', 'Basketball', 'Soccer', 'USA')
test5 = test(6188, 10, 'Tim', 'Football', 'Soccer', 'USA')
objects_list = [test1, test2, test3, test4, test5]

我想根据它们的 ID 属性合并这些对象，对于其余属性，只需列出各个对象：

对于此示例，结果将是两个对象(仅作为两个唯一 ID(，其中一个具有属性：

self.ID = 6124
self.A = [6, 7]
self.B = ['Tim', 'Joe']
self.C = ['Football', 'Basketball']
self.D = ['Soccer', 'Soccer']
self.E = ['USA', 'USA]

如何以这种方式合并列表中的对象？我正在寻找一种解决方案，它不需要我命名任何属性，而是需要我正在合并的属性的名称(ID(。如果这个解决方案可以推广到一次合并多个属性(比如ID和A和E(，那就太好了。

谢谢！ 千斤顶

Answer 1

试试这个解决方案：

from operator import attrgetter
from itertools import groupby

class Test(object):
def __init__(self, ID, A, B, C, D, E):
self.ID = ID
self.A = A
self.B = B
self.C = C
self.D = D
self.E = E

test1 = Test(6124, 6, 'Tim', 'Football', 'Soccer', 'USA')
test2 = Test(6124, 7, 'Joe', 'Basketball', 'Soccer', 'USA')
test3 = Test(6188, 8, 'Joe', 'Basketball', 'Soccer', 'USA')
test4 = Test(6188, 9, 'Joe', 'Basketball', 'Soccer', 'USA')
test5 = Test(6188, 10, 'Tim', 'Football', 'Soccer', 'USA')
objects_list = [test1, test2, test3, test4, test5]
# get names of attributes except 'ID'
attrs = list(x for x in dir(test1) if not x.startswith('__') and x != 'ID')
# iterate through grouped by 'ID' elements
for id_, group in groupby(sorted(objects_list, key=attrgetter('ID')),
key=attrgetter('ID')):
# create result object with lists as attributes
result = Test(id_, *[[]]*len(attrs))
# merge elements
for x in group:
for a in attrs:
setattr(result, a, getattr(result, a) + [getattr(x, a)])
print(result.ID, result.A, result.B, result.C, result.D, result.E)

结果：

6124 [6, 7] ['Tim', 'Joe'] ['Football', 'Basketball'] ['Soccer', 'Soccer'] ['USA', 'USA']
6188 [8, 9, 10] ['Joe', 'Joe', 'Tim'] ['Basketball', 'Basketball', 'Football'] ['Soccer', 'Soccer', 'Soccer'] ['USA', 'USA', 'USA']