python json Exception: KeyError 0

Question

I am trying in a loop that I will create later to give out the names for an Api Post request (here for testing as print) but I always get the error Exception:KeyError 0.

Can someone help there?

file.json:

{ "_meta": {
        "Example1": {
            "00000001": {
                    "name": "Test-01",
                },
            "00000002": {
                    "name": "Test-02"
                },
            },
}

import json

data = json.load(open("file.json"))

name = data["_meta"]["Example1"][0]["name"]


print(f"Name: {name}")

Exception: KeyError 0

Problem:

I want to use an API with POST to create objects in a database. For this purpose I want to build a loop with Python that gives the json keys (00001,00002,...) one by one to the API. Like:

i = 0
while i < 10
data["_meta"]["Example1"][i]["name"]
API
i = i + 1

But my Problem is that 000001 is only an Example the real KeyName is a word such like

{ "_meta": {
        "Example1": {
            "Beta1231": {
                    "name": "Test-01",
                },
            "Frog00123": {
                    "name": "Test-02"
                },
            },
}

data["_meta"]["Example1"] is a dictionary, not a list. It doesn't have a 0 key but "00000001" and "00000002", so KeyError is expected. — alec_djinn
– alec_djinn, Commented Aug 10, 2022 at 9:33
@alec_djinn Do you have any idea how the [0] can be a variable and not a fixed value? — Laurin
– Laurin, Commented Aug 10, 2022 at 10:48
I don't quite get what you are asking. Something like this k="00000001" and then name = data["_meta"]["Example1"][k]["name"] ? What is your goal? Please try describing your problem in a more exhaustive way. Check stackoverflow.com/help/how-to-ask and stackoverflow.com/help/minimal-reproducible-example — alec_djinn
– alec_djinn, Commented Aug 10, 2022 at 12:16
@alec_djinn In the Topic beacuse the Code was not shown right in a comment — Laurin
– Laurin, Commented Aug 10, 2022 at 12:44
It is not clear if you know the keys or not. In your example, it looks like you know them because you can get them from data["_meta"]["Example1"].keys(). So, again, I don't quite get what is the problem here. — alec_djinn
– alec_djinn, Commented Aug 10, 2022 at 13:51

Mouad Slimane · Accepted Answer · 2022-08-10 09:35:17Z

1

the exemple field is a dict not a list so instead of

data["_meta"]["Example1"][0]["name"]

you need to pass a keyname

data["_meta"]["Example1"]["key_name"]["name"]

answered Aug 10, 2022 at 9:35

Mouad Slimane

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1 Comment

Laurin Over a year ago

Thanks for the answer but I needed a variable key name there.

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