How to get an element value in Python dictionary

Question

I am trying to get the value of DomainName from the below dictionary.

print(domain_name)

# output
{
    'DomainNames': [
        {
            'DomainName': 'some-value'
        },
    ]
}

I have tried:

print(domain_name['DomainNames'][0]['DomainName'])

but it doesn't give that value. I even tried:

print(domain_name['DomainNames']['DomainName'])

Here is my code:

def add_es_tags():

    for region in get_regions_depending_on_account():
        pass
    es_client = boto3.client('es', region_name="us-east-1")
    response = es_client.list_domain_names()

    get_es_domain_ARN("us-east-1", response)


def get_es_domain_ARN(region, domain_names):
    es_client = boto3.client('es', region_name=region)

    arns = [] 
    print(len(domain_names))
    for domain_name in domain_names:
        # print(type(domain_name))
        print(domain_name['DomainNames'][0]['DomainName'])

What *does* it give? If that was actually a dictionary holding a list of dictionaries, I'd expect the first attempt to work, `domain_name['DomainNames'][0]['DomainName']` gives the expected `'some-value'` locally. — jonrsharpe, Apr 21 '20 at 13:39
first attempt gives this error `TypeError: string indices must be integers` — Jananath Banuka, Apr 21 '20 at 13:40
So it seems you don't have a dictionary, you have a *string*. See e.g. https://stackoverflow.com/q/988228/3001761 — jonrsharpe, Apr 21 '20 at 13:40
To determine the type of an object you can use `print(type(domain_name))`. — Axe319, Apr 21 '20 at 13:41
@ToRrent you have a json string, you need to unserialize it to Python. boto3.client might already provide this feature in it's API, else you can do it by yourself using `json.loads()` (from the stdlib's json module). — bruno desthuilliers, Apr 21 '20 at 13:48

score 0 · Answer 1 · answered Apr 21 '20 at 13:44

Like this:

domain_name = {
    'DomainNames': [
        {
            'DomainName': 'some-value'
        },
    ]
}

print(domain_name)

print(domain_name['DomainNames'][0]['DomainName'])

Yes, the answer is: it works exactly as you suggested!

Edit: Never mind, I'll update this when you've formulated a full question that actually matches what you're doing.

How to get an element value in Python dictionary

1 Answers1