如何从 python 中的字符串列表创建字典或 json？

Question

I am trying to create dictionary or json from list of strings which is going to be value for dictionary and I have dictionary key that going to be match value. I think it is intuitive for me to get this done, but I have following error:

> Traceback (most recent call last):
>     output[elm].append(k) TypeError: list indices must be integers or slices, not str

I am curious what cause this problem. can anyone point me out what is wrong with me code?

my attempt

here is my code:

update

lst = {api, 1,0,0}
mystring = lst.split(",")

mystring = ['api', '1', '0', '0']
names = {'name', 'mayor', 'minor', 'patch'}

output =[]
for elm in range(len(names)):
    for k in range(len(mystring)):
        output[elm].append(k)

print(output)

how can I fix the error? Is there efficient way to make dictionary or json from list of strings without using nested for loop? any better idea?

desired output :

I want to get dictionary or json something like this:

{
  "mayor": 1,
  "minor": 0,
  "name": "api",
  "patch": 0
}

I am sorry if my coding defect is minor, I couldn't locate source of the problem. thanks

Answer 1

A neat one-liner:

my_string = ['api', '1', '0', '0']
names = ['name', 'mayor', 'minor', 'patch']

output = {names[i]: my_string[i] for i in range(len(my_string))}
print(output)

This should give:

{'name': 'api', 'mayor': '1', 'minor': '0', 'patch': '0'}

Note that your variable names is no longer a set; There was no need to have a set. Also, if there was a set, the code wouldn't work because sets are not subscriptable.

There are a lot of errors in your code: Over here, you are declaring a list, not a dictionary:

output =[]

Over here you are going over the length of your set and list, you have to go over them:

for elm in range(len(names)):
    for k in range(len(mystring)):

Answer 2

Use builtin zip function. Zip works on lists, so you need to convert your set to list first. Of cause it's not a good idea to rely on the order in the set, so it's better to create both lists as list

mystring = ['api', '1', '0', '0']
names = {'name', 'mayor', 'minor', 'patch'}
output = zip(list(names),mystring)
print(dict(output))

or using two lists as an input

mystring = ['api', '1', '0', '0']
names = ['name', 'mayor', 'minor', 'patch']
output = zip(names, mystring)
print(dict(output))

Both prints

{'name': 'api', 'patch': '1', 'mayor': '0', 'minor': '0'}

Of cause if you want numbers to be a number and not string, make sure their types are correct in the list that you pass to zip :

mystring = ['api', 1, 0, 0]
names = {'name', 'mayor', 'minor', 'patch'}
output = zip(list(names),mystring)
print(dict(output))

prints

{'patch': 'api', 'minor': 1, 'mayor': 0, 'name': 0}