Merging two lists into dictionary while keeping duplicate data in python

Question

Hi, I want to merge two lists into one dictionary. Suppose I have two lists such as below

list_one = [\'a\', \'a\', \'c\', \'d\']

list_two = [1,2,3,4]

Answer 1

You have two options :

either you use tuple :

list_one = ['a', 'a', 'c', 'd']

list_two = [1,2,3,4]



print(list(map(lambda x,y:(x,y),list_one,list_two)))

output:

[('a', 1), ('a', 2), ('c', 3), ('d', 4)]

Second option is use this pattern:

dict_1={}

for key,value in zip(list_one,list_two):
    if key not in dict_1:
        dict_1[key]=[value]
    else:
        dict_1[key].append(value)

print(dict_1)

output:

{'a': [1, 2], 'd': [4], 'c': [3]}