string manipulation in python for reading json object and '' removal - Amazon Web Sevices

sumanthshetty
January 10, 2023
257 views
0 votes
2 Answers

I am trying to construct a role in AWS where I am trying to have list of resources.

Below is an example

shared ={
    "mts":{
        "account_id":"11111",
        "workbench":"aaaaa",
        "prefix":"rad600-ars-sil,rad600-srr-sil-stage1,rad600-srr-sil-stage2"
    },
    "tsf":{
        "account_id":"22222",
        "workbench":"bbbbb",
        "prefix":"yyyy"

    }
}

I am trying to construct a list with

role_arn=[]
for key in shared:
    
    role_arn.append(f"arn:aws:iam::'{shared[key]['account_id']}':role/'{shared[key]['workbench']}'_role")

here is my output:

["arn:aws:iam::'11111':role/'aaaaa'_role", "arn:aws:iam::'22222':role/'bbbbb'_role"]

I want the '' to be removed from the list while appending into the list itself.

desired output:

["arn:aws:iam::11111:role/aaaaa_role", "arn:aws:iam::22222:role/bbbbb_role"]

I am trying my hands on python.
IS there a way to achieve it?

Answers

- user2736738
- January 10, 2023 at 4:53 am
- 0 votes
0
```
role_arn=[]
for key in shared:
    
    role_arn.append(f"arn:aws:iam::{shared[key]['account_id']}:role/{shared[key]['workbench']}_role") 
```
You don’t need those ' unless you want them. You can remove it and the string formatting would still work as expected and get rid of the '.

Most likely your concern was coming from not knowing the Lietral format strings. You don’t need to use '' before every variable. {} takes care of it.
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- KalebFenley
- January 10, 2023 at 5:10 am
- 0 votes
0
This is my take on it

This uses dictionary comprehension to iterate over the shared dictionary instead of a for loop
```
shared ={
    "mts":{
        "account_id":"11111",
        "workbench":"aaaaa",
        "prefix":"rad600-ars-sil,rad600-srr-sil-stage1,rad600-srr-sil-stage2"
    },
    "tsf":{
        "account_id":"22222",
        "workbench":"bbbbb",
        "prefix":"yyyy"

    }
}

role_arn = [f"arn:aws:iam::{data['account_id']}:role/{data['workbench']}_role" for key, data in shared.items()]

print(role_arn)
```
Which gives the output

['arn:aws:iam::11111:role/aaaaa_role', 'arn:aws:iam::22222:role/bbbbb_role']
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