使用Python中的重复键制作字典

我有以下列表,其中包含重复的具有不同值的汽车注册号。我想将其转换为字典,该字典接受汽车登记号的多个键。

到目前为止,当我尝试将列表转换为字典时,它消除了键之一。如何制作具有重复键的字典?

清单是:

EDF768, Bill Meyer, 2456, Vet_Parking

TY5678, Jane Miller, 8987, AgHort_Parking

GEF123, Jill Black, 3456, Creche_Parking

ABC234, Fred Greenside, 2345, AgHort_Parking

GH7682, Clara Hill, 7689, AgHort_Parking

JU9807, Jacky Blair, 7867, Vet_Parking

KLOI98, Martha Miller, 4563, Vet_Parking

ADF645, Cloe Freckle, 6789, Vet_Parking

DF7800, Jacko Frizzle, 4532, Creche_Parking

WER546, Olga Grey, 9898, Creche_Parking

HUY768, Wilbur Matty, 8912, Creche_Parking

EDF768, Jenny Meyer, 9987, Vet_Parking

TY5678, Jo King, 8987, AgHort_Parking

JU9807, Mike Green, 3212, Vet_Parking

我试过的代码是:

data_dict = {}

data_list = []

def createDictionaryModified(filename):

path = "C:\Users\user\Desktop"

basename = "ParkingData_Part3.txt"

filename = path + "//" + basename

file = open(filename)

contents = file.read()

print contents,"\n"

data_list = [lines.split(",") for lines in contents.split("\n")]

for line in data_list:

regNumber = line[0]

name = line[1]

phoneExtn = line[2]

carpark = line[3].strip()

details = (name,phoneExtn,carpark)

data_dict[regNumber] = details

print data_dict,"\n"

print data_dict.items(),"\n"

print data_dict.values()

回答:

Python字典不支持重复键。一种解决方法是将列表或集合存储在字典中。

一种简单的方法是使用defaultdict

from collections import defaultdict

data_dict = defaultdict(list)

你要做的就是更换

data_dict[regNumber] = details

data_dict[regNumber].append(details)

你将获得一个列表字典。

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