Question

我正在运行此代码，以将三个列表组合成一个字典，其中第一个列表为键。

list_dict = {x: (y, z) for x, y, z in zip_longest(order_instance, final_mem, final_disk)}
pprint(list_dict)

返回此...

{'instanceIndex:0': ('212590592', '192389120'),
 'instanceIndex:1': ('5971968', '13963264'),
 'instanceIndex:2': ('93331456', '216592384')}

我希望能够格式化此字典以显示y和z值的键，从而使其更易于输入到SQL数据库中。像这样的东西。

{'instanceIndex:0': ((Memory: '212590592'),
                      (Disk: '192389120')),
 'instanceIndex:1': ((Memory: '5971968'),
                      (Disk: '13963264')),
 'instanceIndex:2': ((Memory: '93331456'),
                      (Disk: '216592384'))}

Answer 1

您可以直接修改dict-comprehension以匹配您选择存储值的任何格式。就您而言，键值格式类似于dict的键值格式，因此请使用它。

list_dict = {x: {'Memory':y, 'Disk':z} for x, y, z in zip_longest(order_instance, final_mem, final_disk)}
#               ^^^^^^^^^^  ^^^^^^^^ ^

Answer 2

您可以使用collections.namedtuples将数据存储为命名元组：

class EventTest(APITestCase):
@classmethod
def setUpTestData(cls):
    cls.user = User.objects.create_user(email='test@gmail.com',  
    password='password')

def test_post_create_event(self):
    factory = factories.EventFactory.build()
    serializer = serializers.EventSerializer(factory)

    # IMPORTANT: Calling 'serializer.data' is the exact place the error occurs!
    # This error does not occur when I remove the ManyToManyField
    res = self.post_api_call('/event/', serializer.data)

输出：

from itertools import zip_longest
from collections import namedtuple
from pprint import pprint

inst = ["i1","i2","i3"]
memo = ["1","2","3"]
disk = ["d1","d2","d3"] 

Data = namedtuple("Data", ["Memory","Disk"])

k = {x: Data(m,d) for x, m, d in zip_longest(inst,memo,disk)}

pprint(k)

您可以按索引或按名称访问命名元组：

{'i1': Data(Memory='1', Disk='d1'),
 'i2': Data(Memory='2', Disk='d2'),
 'i3': Data(Memory='3', Disk='d3')}

给出每个字典键值的键

2 个答案: