Adding a new dictionary element?

Question

I have made a simple code of having a dictionary inside a list, how do you add an another element to them? The code is as follow:

Cars = []
Cars.append({"make": "Tesla", "colour": "red"})
print(Cars)
Cars.append({"make": "Toyota", "colour": "green"})
Cars.append({"make": "Ford", "colour": "white"})
print(Cars)

I want it to add a new dictionary element to the list showing year of manufacture so that when I print it shows this

[{'make': Tesla, 'colour': 'red',’year’:2020}
,{"make": "Toyota", "colour": "green",’year’:2020}
,{"make": "Ford", "colour": "white",’year’:2020}
]

You have to do this using the list index, like: `Cars[0]['year'] = 2020` — GAEfan, Aug 16 '20 at 18:41
You don't. You'd have to write a script to test and find the car you want. unless you want to add the same value to all, then just use a loop. — GAEfan, Aug 16 '20 at 18:44
@GAEfan thx very much, but do you know why I got marked down, Im kind new to Stackoverflow? — Vibertex Khan, Aug 16 '20 at 18:46
Does this answer your question? [How can I add new keys to a dictionary?](https://stackoverflow.com/questions/1024847/how-can-i-add-new-keys-to-a-dictionary) — aryanveer, Aug 16 '20 at 18:49
Your question is getting voted down because this is a basic question, and you need to do some research first before asking a question on stackoverflow. This is a duplicate question. — aryanveer, Aug 16 '20 at 18:50
I guess they figure this is a basic python question, and you could have easily Googled it or found similar questions here. This is rather basic list & dictionary ops. — GAEfan, Aug 16 '20 at 18:51
Thx this really helped. But what will happen if my reputation falls below 0? — Vibertex Khan, Aug 16 '20 at 19:00
@VibertexKhan If your reputation falls below 0, you'll have to pay a fine. See [here](https://meta.stackexchange.com/q/48037/824076). — superb rain, Aug 16 '20 at 19:13

jreiss1923 · Answer 1 · 2020-08-16T18:48:07.797

2

for car in Cars:
    car["year"] = 2020

edited Aug 16 '20 at 18:48

answered Aug 16 '20 at 18:43

jreiss1923

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score 1 · Answer 2 · answered Aug 16 '20 at 18:46

1

You need to iterate over the list Cars, and for every element add a new key-value in the dictionary

for car in Cars:
    car['year'] = 2020

answered Aug 16 '20 at 18:46

aryanveer

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score -1 · Answer 3 · answered Aug 16 '20 at 18:43

-1

You could use a for loop to add to each dict in the list like so.

for itm in Cars:
    itm["year"] = 2020

answered Aug 16 '20 at 18:43

Lewis Morris

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It's the same as the answer posted before yours, except with a less meaningful variable name. – superb rain Aug 17 '20 at 04:18
But it's not, not helpful. Just don't respond to it next time maybe... – Lewis Morris Aug 17 '20 at 04:55

score -1 · Answer 4 · answered Aug 16 '20 at 18:48

-1

#step 1- loop through the list

for car in Cars:
    #Step 2 - append the dictionary with key as year and value as 2020
    car["year"] = 2020

Hope this help Happy coding

answered Aug 16 '20 at 18:48

Dev Jalla

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score -1 · Answer 5 · answered Aug 16 '20 at 18:51

-1

You can simply loop through all element of the list and add, below code will update the Cars list elements

[car.update({'year':2020}) for car in Cars]

answered Aug 16 '20 at 18:51

Pranjal Gharat

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Adding a new dictionary element?

5 Answers5